In case you missed it here is the UFO Headline News for today
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Tag: Gemini (page 1 of 4)
by Ines SuljMercury has just gone retrograde again. This time in Gemini, the sign it rules.All the planets, except Sun and Moon, go in apparent backward motion from time to time, yet the Mercury retrograde seems to be the most famous one. Almost everyone knows about it, including the people who know nothing about astrology and those who don’t even believe in it.In astrology, when a planet is in retrograde, it doesn’t actually move backwards in the sky. It only a [...]
Excerpt from savingadvice.com
For those who want to save money, one of the best free resources available to everyone are nature’s displays. The first weekend of the New Year will begin with a bang, although this bang will be of interstellar origins. This weekend (Jan. 3), the first meteor display of 2015 will reach its peak on Saturday night in a display of lights known as the Quadrantid meteor shower. According to science reporter Geoff Gaherty, “Meteor shows are usually named after the constellation in the sky where their radiant is located: the point in the sky from which they appear to radiate. Thus, the Perseids [showers] are named for Perseus and the Geminids [showers] are named for Gemini.”
Interestingly, Gaherty informs the reader that “there is no constellation named Quadrans” whence scientists derived the name Quadrantid. Instead, there was once the Quadrans Muralis constellation, which became a part of the constellation Bootes in 1922. The name of the meteor, however, was retained.
Quadrantids are also known to be a January meteor shower, as opposed to the more famous Perseids observed in August or the Geminids seen in December. Additionally, quadrantid meteors are less frequently observed than the other two meteor showers given that its peak intensity lasts only hours. Still, Gaherty writes that the Quadrantid shower “can produce as many bright meteors during its peak as the more famous Perseids.” Thus, in order to view this spectacular display, “timing is everything.”
Using past observations, researchers predict that the peak of 2015′s Quadrantid meteor shower will occur at 9 p.m. EST on Jan. 3. “During this time, the radiant will be close to the northern horizon and there is a good chance of seeing…meteors coming in close to the horizon to the east and west.”
The radiant, however, is expected to rise higher in the northeastern sky, until more meteors become visible in the east. According to Gaherty, the best time to then observe the Quadrantids will be between midnight and 2 a.m. (some reports say dawn) in the Northern Hemisphere.
Unfortunately, the shooting stars may be hard to view because of an almost-full moon on Saturday, which will radiate its own impressive brightness. Still, NASA predicts that at the peak of the Quadrantid shower, approximately 80 meteors an hour will be released, which should be remarkable in its own right.
Excerpt from
space.com
The spectacular Geminid Meteor shower hits peak activity this weekend. Though competing with some unfortunate moonlight, the shower still should make for a must-see astronomical event.
While moonlight will somewhat hinder this year's Geminid meteor shower, intrepid observers with good weather and low light pollution should still be able to catch a good meteor show Saturday (Dec. 13) night.
"If you have not seen a mighty Geminid fireball arcing gracefully across an expanse of sky, then you have not seen a meteor," note astronomers David Levy and Stephen Edberg.
Even if you can't see the meteor display from your part of the world, you can watch them online. The online Slooh Community Observatory will host a live webacst of the Geminid meteor display on Saturday night beginning at 8 p.m. EST (0100 Dec. 14 GMT).You can also watch the Slooh webcast directly:http://live.slooh.com/. NASA meteor expert Bill Cooke will also host a live Geminids webchat on Saturday night from 11 p.m. to 3 a.m. EST (0400 to 0800 GMT), as well as a live webcast.
You can watch the webcasts of the Geminid shower live on Space.com, starting at 8 p.m. EST, courtesy of Slooh and NASA. The Italy-based Virtual Telescope Project will also host a Geminds webcast, beginning at 9 p.m. EST (0200 GMT).
Although the bright moon will be high in the sky by 11:30 p.m. local time Saturday (Dec. 13) (during the shower's peak), skywatchers can still catch a potentially incredible show before the moon creeps above the horizon, washing out the sky. Stargazers might be able to see an average of one or two Geminid meteors per minute Saturday before the moon rises.
By around 9 p.m., the constellation Gemini — the part of the sky where the meteors seem to emanate from — will have climbed more than one-third of the way up from the horizon. Meteor sightings should begin to really increase noticeably thereafter. By around 2 a.m., the last-quarter moon will be low in the east-southeast, but Gemini will stand high overhead. So you might still see a good number of meteors in spite of the moon's presence.
A brilliant shower
The Geminids are, for those willing to brave the chill of a December night, a very fine winter shower, and usually the most satisfying of all the annual showers. They can even surpass the brilliant August Perseid meteor shower.Studies of past displays show that the Geminid shower is rich both in slow, bright, graceful meteors and fireballs, as well as in faint meteors, with relatively fewer objects of medium brightness. Many Geminids appear yellowish in hue; some even appear to form jagged or divided paths.
These meteors travel at a medium speed and appear to emanate, specifically, from near the bright star Castor, in the constellation of Gemini, the Twins, hence the name "Geminid." In apparent size, that's less than half the width of the moon. As such, this is a rather sharply defined radiant as most meteor showers go. It suggests the stream is "young," perhaps only several thousand years old.
Generally speaking, depending on your location, Castor begins to come up above the east-northeast horizon right around the time evening twilight comes to an end. As the Gemini constellation begins to climb the eastern sky just after darkness falls, there is a fair chance of perhaps catching sight of some "Earth-grazing" meteors. Earthgrazers are long, bright shooting stars that streak overhead from a point near to even just below the horizon. Such meteors are so distinctive because they follow long paths nearly parallel to the Earth's atmosphere.
Because Geminid meteoroids are several times denser than the comet dust that supply most meteor showers and because of the relatively slow speed with which the Geminids encounter Earth (22 miles or 35 kilometers per second), these meteors appear to linger a bit longer in view than most. As compared to an Orionid or Leonid meteor that can whiz across your line of sight in less than a second, a Geminid meteor moves only about half as fast. Personally, their movement reminds me of field mice scooting from one part of the sky to another.
The faint tail can be seen in active asteroid 62412. Credit: Scott Sheppard
Excerpt from Carnegie Institution
By Scott Sheppard
A two-person team of Carnegie’s Scott Sheppard and Chadwick Trujillo of the Gemini Observatory has discovered a new active asteroid, called 62412, in the Solar System’s main asteroid belt between Mars and Jupiter. It is the first comet-like object seen in the Hygiea family of asteroids.
Active asteroids are a newly recognized phenomenon. 62412 is only the 13th known active asteroid in the main asteroid belt. Sheppard and Trujillo estimate that there are likely about 100 of them in the main asteroid belt, based on their discovery.
Active asteroids have stable orbits between Mars and Jupiter like other asteroids. However, unlike other asteroids, they sometimes have the appearance of comets, when dust or gas is ejected from their surfaces to create a sporadic tail effect. Sheppard and Trujillo discovered an unexpected tail on 62412, an object which had been known as a typical asteroid for over a decade. Their findings reclassify it as an active asteroid. The reasons for this loss of material and subsequent tail in active asteroids are unknown, although there are several theories such as recent impacts or sublimation from solid to gas of exposed ices.
Discoveries such as this one can help researchers determine the processes that cause some asteroids to become active. Further monitoring of this unusual object will help confirm the activity’s source.
Sheppard and Trujillo have a paper about this work in press at The Astronomical Journal.
A two-person team of Carnegie’s Scott Sheppard and Chadwick Trujillo of the Gemini Observatory has discovered a new active asteroid, called 62412, in the Solar System’s main asteroid belt between Mars and Jupiter. It is the first comet-like object seen in the Hygiea family of asteroids.
Active asteroids are a newly recognized phenomenon. 62412 is only the 13th known active asteroid in the main asteroid belt. Sheppard and Trujillo estimate that there are likely about 100 of them in the main asteroid belt, based on their discovery.
Active asteroids have stable orbits between Mars and Jupiter like other asteroids. However, unlike other asteroids, they sometimes have the appearance of comets, when dust or gas is ejected from their surfaces to create a sporadic tail effect. Sheppard and Trujillo discovered an unexpected tail on 62412, an object which had been known as a typical asteroid for over a decade. Their findings reclassify it as an active asteroid. The reasons for this loss of material and subsequent tail in active asteroids are unknown, although there are several theories such as recent impacts or sublimation from solid to gas of exposed ices.
Discoveries such as this one can help researchers determine the processes that cause some asteroids to become active. Further monitoring of this unusual object will help confirm the activity’s source.
Sheppard and Trujillo have a paper about this work in press at The Astronomical Journal.
Excerpt from
wallstreetotc.com
Whether it is having a little identity crisis, or astronomers are just noticing a key feature they hadn’t identified before, asteroid 62412 seems to have a comet-like tail.
Normally, astronomers can easily differentiate between comets and asteroids. Comets are comprised of rock and ice and, by approaching the sun at extremely high velocities, ice on their surface sublimates, blasting vapor and dust into space. This is what creates the coma of a comet (an atmosphere like-layer) as well as the tail. On the other hand, asteroids are mostly comprised of rock.
Curiously, in recent years, astronomers discovered that there were some asteroids with comet-like features, which appeared to not only be happily orbiting in the main asteroid belt between Mars and Jupiter, but also exhibited comet-like tails.
“Until about ten years ago, it was pretty obvious what a comet was and what a comet wasn’t, but that is all changing as we realize that not all of these objects show activity all of the time,”Scott Sheppard, one of the asteroid’s observers said.
Sheppard and Chadwick Trujillo (of the Gemini Observatory) were the ones who discovered the asteroid’s comet-like tail, making 62412 the 13th asteroid of its type in the asteroid belt.
Hygiea asteroids all originate from a massive asteroid 250 mile-wide (once fourth largest asteoid in the belt). The asteroid was fragmented into many smaller asteroids after a huge collision. Why the 62412 asteroid has a tail is still unknown to scientists, however, they believe that ice could have suddenly been exposed to the sun. It then vaporizes and releases dust in the air. Another theory is that there may be asteroid-on-asteroid impacts and that these are causing the comet-like tail.
Astronomers estimate that the main belt contains approximately 100 such objects.
cafeastrology.comA NEW Moon occurs on Wednesday, September 24, 2014, at 2:14 AM EDT. Early Wednesday, a new cycle begins. The Virgo New Moon cycle ends and the Libra New Moon cycle begins. The New Moon in Libra cycle is a good time to commit ...
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| Artist's rendering of a black hole recently discovered in the ultracompact dwarf galaxy M60-UCD1. |
The discovery of a supermassive black hole inside a tiny dwarf galaxy has shed new light on the potential number of black holes in the universe.
An international team of researchers has discovered a supermassive black hole in M60-UCD1, a dwarf galaxy some 54-million light years away. M60-UCD1 is about 500 times smaller than our own galaxy, the Milky Way, and 1,000 times less massive. The researchers published their findings Wednesday in Nature.
An international team of researchers has discovered a supermassive black hole in M60-UCD1, a dwarf galaxy some 54-million light years away. M60-UCD1 is about 500 times smaller than our own galaxy, the Milky Way, and 1,000 times less massive. The researchers published their findings Wednesday in Nature.
Scientists have previously identified numerous supermassive black holes throughout the universe – including one at the center of the Milky Way. But this is the first time that any of these largest types of black holes have been found in such a small galaxy, says study lead author Anil Seth, an assistant professor of physics and astronomy University of Utah in Salt Lake City.
The revelation that a supermassive black hole can exist within an ultracompact dwarf galaxy could mean that there might be twice as many of these largest black holes than astronomers previously thought.
Black holes come in several different varieties, all of which are characterized by a dense concentration of mass compressed into a tiny space and a gravitational force so powerful it keeps light from escaping.
The smallest kind, called a primordial black hole, is the size of a single atom, but it contains the mass of a large mountain. The most widely understood black holes are known as stellar black holes and can contain 20 times the mass of the sun within a ball of space with a diameter of about 10 miles. Supermassive black holes can be as vast as the entire solar system and contain as much mass as found in 1 million suns combined.
Primordial black holes are believed to have formed during the early evolution of the universe, shortly after the Big Bang. Stellar black holes are thought to be the result of the collapse of a massive star. The formation of supermassive black holes has so far remained something of a mystery.
“We know supermassive black holes exist in the center of most big galaxies … but we actually don’t know how they’re formed,” says Dr. Seth. “We just know they formed a long time ago.”
Black holes are difficult to study because their tendency to pull light inside their centers renders them effectively invisible.
Telescopes can observe contextual clues that suggest the presence of a black hole, such as stars orbiting around an apparent void.
“We can actually see stars moving around the center of the supermassive black hole of our galaxy,” Seth says. “It is much more difficult to study smaller galaxies.”
This particular dwarf galaxy happens to have so many stars – and a black hole that is so large – that telltale signs of the black hole were detected by two telescopes, the optical/infrared Gemini North telescope atop Hawaii’s Mauna Kea and the Hubble Space Telescope.
Typically, the size of a black hole is directly proportional to the size of the galaxy. Seth suspects that M60-UCD1 is actually the remains of a much larger galaxy.
“We think that this thing is a galaxy where the outer part of the galaxy has been stripped away by an interaction with another bigger galaxy and that the core has been left behind,” Seth explains.
In general, however, current technology has not yet reached a point that enables astronomers to definitively identify the presence of black holes in smaller galaxies.
By studying this and other black holes, scientists hope to unravel some of the mysteries of the origins of the universe.
“It turns out that black holes actually play a pretty big role in how galaxies form,” Seth says. “To understand our origin story we need to understand the formation of galaxies. And black holes, even though they are just a tiny fraction of all the mass in the galaxy, can play a really important role in their evolution."
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