Tag: match (page 1 of 5)

12 Homeopathic Remedies That Should Be in Every Survival Kit

Bonnie Camo, MD, GuestIn the event of a natural or man-made disaster, you may be cut off from medical aid. One of the most important things to have on hand will be a homeopathy emergency survival kit. Homeopathy is cheap, effective, and has no side effects. This medical science uses natural substances to stimulate the body to heal itself. Most homeopathic remedies are made from herbs and minerals, and they are based on the principle discovered over 200 years ago in Germany by Dr. Sam [...]

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The Science of the Dogon

May 19, 2015 / Steven Laniers Metaphysical Directory - Main Article Directory / 0 Comments

Excerpt from The Science of The Dogon, by Laird ScrantonThe information presented in the preceding chapters demonstrates a direct relationship between the symbols and themes of the Dogon creation story and known scientific facts relating to the formation of the universe, matter, and biological reproduction. This relationship is a broad and specific one that is couched in clear definitions and supported by priestly interpretations and cosmological drawings. The parallels between Dogon myth [...]

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Sea Salt Discovered on Jupiter’s Moon Europa

May 17, 2015 / Greg Giles / 0 Comments

$This image shows a view of the trailing hemisphere of Jupiter's ice-covered satellite, Europa, in approximate natural color. Long, dark lines are fractures in the crust, some of which are more than 3,000 kilometers (1,850 miles) long. Image via Galileo spacecraft in 1996.$

Europa is thought to have a subsurface ocean. Salt from this hidden sea might be emerging in long fractures visible in the moon’s crust.

Excerpt earthsky.org

Laboratory experiments have lead to new information about the chemical composition of the mysterious dark material in the long, dark fractures on the surface of Europa, a large moon of Jupiter. Researchers at NASA’s Jet Propulsion Laboratory (JPL) mimicked conditions on Europa’s surface. They now say that the dark material is discolored salt, likely sea salt from below the moon’s icy crust. The journal Geological Research Letters published their study on May 15, 2015.

The scientists say this new insight is important in considering whether this icy moon might be hospitable for extraterrestrial life. The life question is a key one for Europa, since this world is believed to have a liquid ocean beneath its crust. The presence of sea salt on Europa’s surface suggests the ocean is interacting with its rocky seafloor.

Scientists have been intensely curious about Europa since Galileo discovered it in 1610. In recent years, they’ve puzzled over the dark material coating the long, linear fractures on Europa’s observable surface. The material was associated with young terrain on this moon of Jupiter, suggesting that it had erupted from within Europa.
However, the chemical composition of the dark material remained elusive, until now.
Planetary scientist Kevin Hand at JPL led the new study. He said in a statement:

If it’s just salt from the ocean below, that would be a simple and elegant solution for what the dark, mysterious material is.

Europa is immersed radiation from Jupiter’s powerful magnetic field, causing high-powered electrons to slam into the moon’s surface. Hand and his team created a laboratory test that mimicked the conditions of Europa’s temperature, pressure, and radiation exposure. They tested a variety of samples including common salt – sodium chloride – and salt water in a vacuum chamber at Europa’s chilly surface temperature of minus 280 degrees Fahrenheit (minus 173 Celsius). They also bombarded the samples with an electron beam to imitate Jupiter’s influence.

After several hours – a time period corresponding to over a century on Europa, the researchers said – the salt samples were observed to go from white to a yellowish brown, the color similar to the features on the icy moon. Hand said:

This work tells us the chemical signature of radiation-baked sodium chloride is a compelling match to spacecraft data for Europa’s mystery material.

A “Europa-in-a-can” laboratory setup at NASA-JPL mimics conditions of temperature, near vacuum and heavy radiation on the surface of Jupiter’s icy moon. Image via NASA/JPL-Caltech

A close-up of salt grains discolored by radiation following exposure in a

Close-up of salt grains discolored by radiation following exposure in a “Europa-in-a-can” test setup at JPL. Image via NASA/JPL-Caltech

Until now, telescopic observations have only shown glimpses of irradiated salts. No telescope on Earth can observe Europa’s surface with enough resolution to identify them with certainty. Researchers suggest additional spacecraft observation to gather more evidence.
A visit to this icy world would help answer the most tantalizing questions about Europa. Long believed to have a liquid ocean of salt water below its icy surface, this moon continues to display promising conditions for extraterrestrial life.

As Europa orbits Jupiter, it experiences strong tidal forces similar to Earth and the Moon. These forces from Jupiter and the other Jovian moons cause Europa to flex and stretch, which creates heat, and results in Europa having a warm internal temperature than it would with just the heat from the Sun alone.

Recent observable geological activity also creates strong evidence that the subsurface ocean interacts directly with Europa’s rocky interior, making geothermal vents, like those in Earth’s oceans, a strong possibility as well.

These hydrothermal vent ecosystems on Earth thrive with no energy from the sun. Bacteria, shrimp and crustaceans have all been observed in these extreme environments, surviving on what researchers have deemed chemosythesis.

With Europa’s enormous amount of liquid salt water, essential chemical elements and geological activity, this long discovered icy moon appears to be one of the solar systems most promising locations for habitable requirements for life.

However, until a devoted spacecraft visit’s, nothing beyond hopeful speculation can be proven, the researchers say.

Bottom line: Researchers at NASA’s Jet Propulsion Laboratory created laboratory conditions that mimicked those on Jupiter’s large moon Europa, to learn the chemical compositions of the material in long, dark fractures in the moon’s surface. They now believe this material is sea salt, which has emerged to Europa’s surface from its liquid ocean below.

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Dying With Dignity

May 13, 2015 / Greg Giles / 0 Comments

Excerpt from huffingtonpost.comBy Debbie FinkCo-authored by Karen Bloch MorseThere is nothing easy or natural about watching your 41-year-old friend (of 41 years) -- who, by all counts, looks healthy -- ...

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22 Terrifying and Magical Capabilities Someone Has When You Fall For Them

May 10, 2015 / Greg Giles / 0 Comments

Excerpt from huffingtonpost.comLove is terrifying, and terror is love.How exceptional is falling in love? How breathtakingly incredible? How painful and enchanted it is to have your heart opened. It presents so many chances for overwhelming pain, an...

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Ancient Signs in the Sky: Did a Meteorite Change the Course of Christianity 2,000 Years Ago?

May 3, 2015 / Greg Giles / 0 Comments

Detail, The Conversion of St. Paul. Paul and companions are knocked to the ground during the profound event.

Excerpt from ancient-origins.net

Did an ancient meteor have such a life-changing impact on witnesses of the day that it shaped a religion and altered the course of history? Astronomers theorize that the dramatic flash and boom that converted Paul the Apostle may have been an exploding meteor.

In the Christian Bible, it is written that a man named Saul experienced an event so extreme that it changed his views in an instant, and he became one of the most influential evangelists in early Christianity.

Saul was said to have been a vehement persecutor of the followers of Jesus and was traveling in search of disciples of Jesus for punishment. It is written in the fifth book of the New Testament, Acts of the Apostles, that Saul was on the road to Damascus, Syria, when a bright light appeared in the sky. So intense was the light that he was blinded for three days. What he heard was described as a great thunderous sound, or a divine voice. He and his companions are said to have been knocked to the ground by the force of the event. The experience was so profound that Saul changed his name to Paul, took up missionary journeys across the Mediterranean, and became instrumental in spreading Christianity.

The Conversion of Saint Paul – Paul and his companions are knocked to the ground by a resounding boom and brilliant light. Did a meteor cause this ancient event?

William Hartmann, co-founder of the Planetary Science Institute in the U.S. has connected Paul’s experience with similar accounts of exploding meteors, such as the well-recorded Chelyabinsk meteor which broke up over Russia in 2013, injuring over 1,500 people. The eyewitness descriptions and physical reactions to meteors or fireballs in the sky seem to parallel what is recorded about Paul.

Meteor trail over Chelyabinsk, Russia. Wikimedia Commons

If true, then it’s possible that an act of nature may have been contributory in the spread and evolution of Christianity in its early days, and therefore shaped the course of history.

In a study published in the journal Meteoritics and Planetary Science, Hartmann cites major events like the meteors or asteroids over Chelyabinsk, Russia and Tunguska, Siberia as offering “opportunities to compare reactions of modern eyewitnesses to eyewitness accounts of possible ancient fireball events.” There are consistencies among the many accounts suggesting the biblical descriptions of Paul’s experience closely match known modern events, reports NewScientist.

In the biblical accounts, Paul was blinded for three days due to the intense light from the sky; it was “brighter than the sun, shining round me,” according to the text. This matches the Chelyabinsk meteor, as it was calculated to be shining around three times as bright as the sun. The blazing fireball made shadows move around the ground as it travelled.

Paul and his companions were said to have been knocked to the earth, and this also corresponds to the shockwave generated by the powerful Chelyabinsk meteor as it blasted out windows, knocked people off their feet, shook cars and buildings, and collapsed roofs.
The divine voice is said to have either boomed like thunder, or questioned Paul’s behavior (the exact sound is debated). Meteors create great, explosive booms and roars which can be scary or painful even for those who know what they’re experiencing.

To the ancients the incredible and unfamiliar natural celestial events were interpreted through cultural understandings of the day – which is to say, they were considered divine or damning.

The Chelyabinsk meteor gave off small amounts of radiation, enough to cause sunburn and temporary blindness in witnesses. Harmann suggests that Paul could have suffered photokeratitis, a temporary blindness from intense ultraviolet radiation, and this explains the return of his sight after healing.

Paul having his sight restored after being blinded by a celestial light that might have been a meteor.

Hartmann told NewScientist, “Everything they are describing in those three accounts in the book of Acts are exactly the sequence you see with a fireball.”

IBTimes writes that the Acts of Apostles text describes three events of bright lights “from heaven” which took place around Damascus during the 30s B.C. If meteorites can be found in Syria, and accurately dated to the relevant timeframes, it might give support to the published theories.

Hartmann’s research aim is not to discredit Christianity, but to demonstrate how the interpretation of ancient events may have shaped how we exist today, spiritually and culturally.

This wouldn’t be the first meteorite in history to have potentially inspired worship or acted as an agent of change. In antiquity meteorites were seen as messages from the gods, or profound omens, and many cultures saw fallen meteorites as religious icons to be worshiped or as objects of protection. Jewelry and art has also been created from the space rocks.

Each year devout Muslims make the pilgrimage to Mecca in Saudi Arabia, circling the Kaaba, or black stone, and give a nod or a kiss to the meteorite that is said to rest inside the Grand Mosque. The worship of the Black Stone goes back to pre-Islamic shrines, when Semitic cultures used unusual stones to signify sites of reverence. According to Muslim belief, the stone originates from the time of Adam and the Islamic prophet Muhammad set the Black Stone in place after it fell from the skies.

A 1315 illustration inspired by the story of Muhammad and the Meccan clan elders lifting the Black Stone into place. Was the black stone a meteor from space?

In a more modern example, after the dramatic Chelyabinsk event over Russia in 2013, the ‘Church of the Meteorite’ was set up, and the followers hold rites on the shores of Lake Chebarkul where pieces of the space rock fell.

Some scientists regard the Conversion of Paul theory as speculation, but seem to welcome further evidence.
Bill Cooke, head of NASA's Meteoroid Environment Office told NewScientist, “It’s well recorded that extraterrestrial impacts have helped to shape the evolution of life on this planet. If it was a Chelyabinsk fireball that was responsible for Paul’s conversion, then obviously that had a great impact on the growth of Christianity.”

Indeed, “Some scholars call Paul the second founder of Christianity” says Justin Meggitt, religious historian at the University of Cambridge. Without the fireball, and without Paul’s conversion, perhaps Christianity would be different than it is today.
“Christianity probably would be very different without him,” Meggitt concludes.

Illumination from 1450 depicting Paul's conversion – the bright light and sound come from the sky. The event was said to change Paul, and may have changed history. Public Domain

Featured Image: Detail, The Conversion of St. Paul. Paul and companions are knocked to the ground during the profound event.

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Tesla to unveil ‘mystery’ life changing product tonight!

April 30, 2015 / Greg Giles / 0 Comments

Tesla's expected home battery announcement could spark energy revolution. SolarCity has already installed 300 Tesla-made batteries in California homes.

Excerpt from CBC News

Tesla CEO Elon Musk is set to make an announcement later tonight. There's been speculation that a large-scale battery announcement is expected, but it's not clear if that will be the case.

The man behind the electric car revolution is expected to unveil a large-scale battery capable of powering an entire house, during an announcement at Tesla Motors headquarters in Hawthorne, Calif.
While the battery will likely slash power bills for consumers, some say it's also a move toward democratizing energy systems.

Elon Musk, CEO of Tesla Motors, teased the announcement on Twitter a month ago, saying a major new Tesla product line will be unveiled at Hawthorne Design Studio at 8 p.m. local time Thursday. "Not a car," he wrote, sparking speculation that it may be a home battery.

Musk, who moved to Canada from South Africa and who briefly studied at Queen's University in Kingston, Ont., before transferring to the University of Pennsylvania, is also chairman of SolarCity, a solar power provider.

SolarCity has already run a pilot program where it installed 300 home batteries made by Tesla in California homes. Another 130 systems were being installed in early 2015, according to the company's website.

The product will be available again in late summer, the company says, as it's working on "the next phase" of the program.

Tesla is also in the midst of building its gigafactory, which has added to the speculation that the company is unveiling a home battery. Musk says that by 2020, the factory will produce more lithium-ion batteries than all the current factories producing them today.

A home battery attaches to a home's electrical system and collects energy gathered by solar panels when the sun is out, Michael Ramsey, a Wall Street Journal automotive reporter, told CBC's The Current. That energy can then be used when the sun is no longer out.

'This is this shift away from very large centrally operated plants towards everybody owning their own little power grid or part of a small power grid in a condo building.'-— Warren Mabee, of Queen's University

"The idea is that you purchase this system and it allows you effectively to cut the cord," he says of a consumer's ability to forgo energy from the grid. The consumer's electricity bills would be significantly reduced because they would be paying for less electricity from the grid.

This innovation could move the world toward a future where power is generated where we need it and where we use it, says Warren Mabee, director of the Queen's Institute for Energy and Environmental Policy.

"This is this shift away from very large centrally operated plants towards everybody owning their own little power grid or part of a small power grid in a condo building," Mabee says.

In this system, centralized power generation becomes more of a backup than a driver, he says.

Costs remain high

However, the current systems are still very expensive, says Ramsey. The 300 home batteries installed in California cost upward of $20,000, he says.

"It would take years and years and years to cover the utility costs," he says. "It doesn't make sense unless the costs come down."

Ramsey views businesses as having the highest possible economic advantage from this development. The battery could offer businesses a surge of electricity when they have a high demand for power and cut their bills.

Mabee compares the cost of solar panels to cellphones. Smartphones were once very expensive, but each new generation has brought the cost down, he said.

Each year, solar panels become better and cheaper. Solar panels are getting close to their grid parity moment — when the cost of generating solar power is the same or cheaper than buying energy off the grid.

Another grid parity moment may be close, says Mabee. It won't be long before the cost of a solar panel and battery system will match the cost of purchasing electricity from the grid, he estimates.
"That magic grid parity moment is coming faster and faster," he said.

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Explosive Culprit? Russian Fireball’s Origins Found

April 13, 2015 / Greg Giles / 0 Comments

A photograph of the Annama meteorite fireball over Russia's Kola Peninsula.

Excerpt from space.com

A crackling fireball that exploded over Russia last year appears to share an orbit with a huge asteroid discovered in October 2014, a new study reports.

The Kola fireball was spotted on April 19, 2014, as it lit up the night sky above the Kola Peninsula near the Finnish-Russian border. Its orbit is "disturbingly similar" to the asteroid 2014 UR116, slated to pass by the moon in 2017, the study authors said.
Camera observations by the Finnish Fireball Network, which monitors the sky for meteors and fireballs, and video from eyewitnesses helped scientists recreate the meteoroid's trajectory and hunt down meteorite fragments on the ground.

Josep Maria Trigo-Rodríguez, a researcher at the Institute of Space Sciences in Barcelona, Spain, led the international team of scientists who analyzed the meteorite's orbit. They calculated the fireball's size and path through Earth's atmosphere by examining its flight and the meteorite's final impact site. A computer model based on these figures was used to estimate the space rock's orbital path.

The 1,100-pound (500 kilogram) meteorite is an ordinary H5 chondrite, a type of stony meteorite responsible for 31 percent of Earth's impacts. The fragments are called the "Annama meteorite" because the meteorite fell near the Annama River in Russia.

The precise detective works suggests the fireball escaped from the innermost region of the asteroid belt, the study researchers reported. The rock has an elliptical orbit that is typical of the Apollo family of near-Earth orbiting asteroids, and it likely came from the same broad source region as the Lost City, Peekskill and Buzzard Coulee meteorites, the researchers said.

The researchers compared the Annama meteorite's orbit with known near-Earth asteroids (there are more than 1,500). Of 12 potential matches, by far the closest match was with the asteroid 2014 UR116, they said.

The findings were published April 7 in the journal Monthly Notices of the Royal Astronomical Society.

The new report does not suggest that asteroid 2014 UR116 flung the Annama meteorite directly at Earth. However, the two bodies could be related. Scientists think that streams of asteroid fragments — such as the remnants of interstellar collisions — can sail on nearly identical orbits. Tidal forces may stretch out these rocky debris patches over time. Asteroids may also fragment from the stress of passing near the planets, the researchers noted.

"The tidal effect on an asteroid, which rapidly rotates under the gravitational field of a planet, can fragment these objects or release large rocks from its surface, which could then become dangerous projectiles at a local scale, such as the one that fell in Chelyabinsk, Russia," Trigo-Rodríguez said in a statement.

Asteroid 2014 UR116, discovered by Russian scientists on Oct. 27, 2014, measures 1,312 feet (400 meters) across, but does not pose an impact danger to Earth, according to NASA.

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Aliens Might Weigh As Much As Polar Bears And Be Taller Than The Tallest Man Who Ever Lived

April 11, 2015 / Greg Giles / 0 Comments

Excerpt from huffingtonpost.com

No one really knows whether we're alone or if the universe is brimming with brainy extraterrestrials. But that hasn't stopped scientists from trying to figure out what form intelligent aliens might take.

And as University of Barcelona cosmologist Dr. Fergus Simpson argues in a new paper, most intelligent alien species would likely exceed 300 kilograms (661 pounds)--with the median body mass "similar to that of a polar bear."

If such a being had human proportions, Simpson told The Huffington Post in an email, it would be taller than Robert Wadlow, who at 8 feet, 11 inches is believed to have been the tallest human who ever lived.

Robert Wadlow (1918-1940), the tallest man who ever lived.

Simpson's paper, which is posted on the online research repository arXiv.org, is chockablock with formidable-looking mathematical equations. But as he explained in the email, his starting point was to consider the relationship between the number of individuals in a population on Earth and the body mass of those individuals:

"Ants easily outnumber us because they are small. Our larger bodies require a much greater energy supply from the local resources, so it would be impossible for us to match the ant population. Now apply this concept to intelligent life across the universe. On average, we should expect physically larger species to have fewer individuals than the smaller species. And, just like with countries, we should expect to be in one of the bigger populations. In other words, we are much more likely to find ourselves to be the ants among intelligent species."

Or, as Newsweek explained Simpson's argument, there are probably more planets with relatively small animals than planets with relatively large animals. It makes sense to assume that Earth is in the former category, so we can assume that humans are probably among the smaller intelligent beings.

What do other scientists make of Simpson's paper?

“I think the average size calculation is reasonable,” Dr. Duncan Forgan, an astrobiologist at the University of St. Andrews in Scotland who wasn't involved in the research, told Newsweek.
But to Dr. Seth Shostak, senior astronomer at the SETI Institute in Mountain View, Calif., the argument is suspect.

"There is an assumption here that intelligence can come in all (reasonable) sizes, and does so with more or less equal likelihood," Shostak told The Huffington Post in an email. "That may be true, but on Earth bigger has not always been better, at least in the brains department. Dolphins have higher IQs than whales, and crows are smarter than eagles. Octopuses are cleverer than giant squids, and obviously we’re smarter than polar bears."

Ultimately, Shostak said, we can’t know whether "little green men are actually big green men" before we actually make contact.
Until then!

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Amazing Images of Comet 67P/Churyumov-Gerasimenko

March 21, 2015 / Greg Giles / 0 Comments

Comet 67P/C-G is about as large as Central Park of Manhattan Island, New York

Excerpt from nytimes.com

By JONATHAN CORUM

The European Space Agency’s Rosetta spacecraft caught up with Comet 67P/Churyumov-Gerasimenko last August, then dropped a lander onto the comet in November. Now Rosetta will follow the rubber-duck-shaped comet as it swings closer to the sun.

Scale in miles

Scale in km

1/2 MILE

March 9 Rosetta was 45 miles from Comet 67P/C-G when it photographed the comet’s head ringed with a halo of gas and dust. These jets extend from active areas of the comet’s surface and will become much more prominent over the next few months as the comet approaches the sun.

1/2 MILE

March 6 The comet’s head is angled down in this image of crisscrossing sunlit jets taken from 53 miles away.

Comet’s location when Rosetta was launched Rosetta launched in March 2004

Earth

Sun

Mars

Rendezvous

with Comet

67P/C-G

Orbit of

Jupiter

Rosetta today

Where is Rosetta? The Rosetta spacecraft took 10 years to match speed and direction with Comet 67P/C-G. The chase ended last August, and Rosetta will now follow the comet in its elliptical orbit as it moves closer to the sun. The spacecraft is no longer orbiting the comet because of increasing dust, but it is planning a series of close flybys.

1/2 MILE

March 6 Rosetta was 52 miles away when it looked up at the comet’s flat underbelly. The smooth plain at center covered with large boulders is named Imhotep.

1/2 MILE

Feb. 28 Rosetta captured a profile of the comet surrounded by curving jets of gas and dust from active regions. The spacecraft was 64 miles away.

Feb. 25–27 One day on Comet 67P/C-G is about 12 hours, the time it takes the comet to spin on its axis. The jets of gas and dust surrounding the comet are thought to curve from a combination of the comet’s rotation and the uneven gravity of its two-lobed structure.

1/2 MILE

Feb. 20 The comet’s sunlit underbelly casts a shadow obscuring the neck that joins the two lobes. Rosetta took this image from 74 miles away.

1 MILE

Feb. 18 Pale jets of gas and dust surround Comet 67P/C-G, seen from 123 miles away. Bright marks in the background are a mix of stars, camera noise and streaks from small particles ejected from the comet.

1/4 MILE

Panorama by The New York Times

Feb. 14 On Valentine’s Day, Rosetta made its first close flyby of the comet, passing within four miles of the surface. Here the spacecraft looks down on the large depression at the top of the comet’s head.

500 FEET

Feb. 14 An image of the comet’s underbelly taken six miles above the surface during the Valentine’s Day flyby. The smooth plain in the foreground is called Imhotep.

1/2 MILE

Feb. 9 The comet is upside down in this image from 65 miles away, and a fan-shaped jet of dust streams from the comet’s neck region.

1/2 MILE

Feb. 6 Jets of gas and dust extend from the comet’s neck and other sunlit areas in this image taken from 77 miles away.

1/4 MILE

Feb. 3 This close-up image of the comet’s neck was taken from 18 miles away, and was the last image taken from orbit around Comet 67P/C-G. Rosetta will continue to follow the comet, but will leave its gravity-bound orbit because of increasing dust and instead begin a series of flybys.

1/4 MILE

Jan. 31 The comet’s head, neck and back are sunlit in this image taken from 17 miles away. A prominent jet of gas and dust extends from an active region of the surface near the comet’s neck.

1/4 MILE

Jan. 16 The tail of the comet’s larger lobe points up, revealing a smooth plain named Imhotep at left. Rosetta was 18 miles away when it took this image.

1/4 MILE

Jan. 3 The smooth plain named Imhotep, at center right, lies on the comet’s flat underbelly, seen here from a distance of about 18 miles.

1/4 MILE

Cheops

IMHOTEP

Dec. 14, 2014 The large triangular boulder on the flat Imhotep plain is named Cheops, after the Egyptian pyramid. The spacecraft was about 12 miles from the comet when it took this image.

1/4 MILE

Dec. 10 Sunlight falls between the body and head of the comet, lighting up a large group of boulders in the smooth Hapi region of the comet’s neck. To the right of the boulders, the cliffs of Hathor form the underside of the comet’s head. Rosetta took this image from a distance of 12 miles.

1/4 MILE

Dec. 2 The round depression in the middle of the comet’s head is filled with shadow in this image taken 12 miles above the comet.

1/4 MILE

Nov. 22 An overexposed image of Comet 67P/C-G from 19 miles away shows faint jets of gas and dust extending from the sunlit side of the comet.

Philae photo from the surface of Comet 67P/C-G.

Nov. 12 Rosetta’s washing-machine sized lander Philae successfully touched down on the comet’s head. But anchoring harpoons failed and Philae bounced twice before going missing in the shadow of a cliff or crater (above). Without sunlight Philae quickly lost power, but might revive as the comet gets closer to the sun. On March 12, Rosetta resumed listening for radio signals from the missing lander.

Photo illustration by The New York Times

How big is the comet? The body of Comet 67P/C-G is about as long as Central Park. For images of Rosetta’s rendezvous and the Philae landing, see Landing on a Comet, 317 Million Miles From Home.

Sources: European Space Agency and the Rosetta mission. Images by ESA/Rosetta, except where noted. Some images are composite panoramas created by ESA, and most images were processed by ESA to bring out details of the comet’s activity.

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MAVEN mission finds early surprises in Martian atmosphere

March 20, 2015 / Greg Giles / 0 Comments

Excerpt from chroniclebulletin.com University of Colorado-led Mars mission has observed two unexpected phenomena in the Martian atmosphere, unveiled Wednesday at the 46th Lunar and Planetary Science Conference in Texas.NASA describes the finds by MA...

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This Alien Color Catalog May Help Us Spot Life on Other Planets

March 16, 2015 / Greg Giles / 0 Comments

Excerpt from smithsonianmag.com

In the hunt for alien life, our first glimpse of extraterrestrials may be in the rainbow of colors seen coming from the surface of an exoplanet.

That's the deceptively simple idea behind a study led by Siddharth Hegde at the Max Planck Institute for Astronomy in Germany. Seen from light-years away, plants on Earth give our planet a distinctive hue in the near-infrared, a phenomenon called red edge. That's because the chlorophyll in plants absorbs most visible light waves but starts to become transparent to wavelengths on the redder end of the spectrum. An extraterrestrial looking at Earth through a telescope could match this reflected color with the presence of oxygen in our atmosphere and conclude there is life here.

Eight of the 137 microorganism samples used to measure biosignatures for the catalog of reflection signatures of Earth life forms. In each panel, the top is a regular photograph of the sample and the bottom is a micrograph, a version of the top image zoomed-in 400 times.

Plants, though, have only been around for 500 million years—a relative blip in our planet's 4.6-billion-year history. Microbes dominated the scene for some 2.5 billion years in the past, and some studies suggest they will rule the Earth again for much of its future. So Hegde and his team gathered 137 species of microorganisms that all have different pigments and that reflect light in specific ways. By building up a library of the microbes' reflectance spectra—the types of colors those microscopic critters reflect from a distance—scientists examining the light from habitable exoplanets can have a plethora of possible signals to search for, the team argues this week in the Proceedings of the National Academy of Sciences.

"No one had looked at the wide range of diverse life on Earth and asked how we could potentially spot such life on other planets, and include life from extreme environments on Earth that could be the 'norm' on other planets," Lisa Kaltenegger, a co-author on the study, says via email. "You can use it to model an Earth that is different and has different widespread biota and look how it would appear to our telescopes."

To make sure they got enough diversity, the researchers looked at temperate-dwelling microbes as well as creatures that live in extreme environments like deserts, mineral springs, hydrothermal vents or volcanically active areas.

While it might seem that alien life could take a huge variety of forms—for instance, something like the silicon-based Horta from Star Trek—it's possible to narrow things down if we restrict the search to life as we know it. First, any life-form that is carbon-based and uses water as a solvent isn't going to like the short wavelengths of light far in the ultraviolet, because this high-energy UV can damage organic molecules. At the other end of the spectrum, any molecule that alien plants (or their analogues) use to photosynthesize won't be picking up light that's too far into the infrared, because there's not enough energy at those longer wavelengths.

In addition, far-infrared light is hard to see through an Earth-like atmosphere because the gases block a lot of these waves, and whatever heat the planet emits will drown out any signal from surface life. That means the researchers restricted their library to the reflected colors we can see when looking at wavelengths in the visible part of the spectrum, the longest wavelength UV and short-wave infrared.

The library won't be much use if we can't see the planets' surfaces in the first place, and that's where the next generation of telescopes comes in, Kaltenegger says. The James Webb Space Telescope, scheduled for launch in 2018, should be able to see the spectra of relatively small exoplanet atmospheres and help scientists work out their chemical compositions, but it won't be able to see any reflected spectra from material at the surface. Luckily, there are other planned telescopes that should be able to do the job. The European Extremely Large Telescope, a 40-meter instrument in Chile, will be complete by 2022. And NASA's Wide Field Infrared Survey Telescope, which is funded and in its design stages, should be up and running by the mid-2020s.

Another issue is whether natural geologic or chemical processes could look like life and create a false signal. So far the pigments from life-forms look a lot different from those reflected by minerals, but the team hasn't examined all the possibilities either, says Kaltenegger. They hope to do more testing in the future as they build up the digital library, which is now online and free for anyone to explore at biosignatures.astro.cornell.edu.

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Milky Way Galaxy May Be 50 Percent Bigger Than We Thought

March 11, 2015 / Greg Giles / 0 Comments

Excerpt from cbsnews.com Rings of stars thought to surround the Milky Way are actually part of it, according to new research, meaning the galaxy is bigger than previously believed.The findings extend the known width of the Milk...

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Milky Way Galaxy May Be 50 Percent Bigger Than We Thought

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