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Skychart by A. Fazekas/SkySafari |
Excerpt from
Green Giant, Lunar Triangle and Jovian Shadows A planetary pairing and moon dances take center stage in the heavens this week.
Neptune meets Mars this week for stargazers, while Jupiter's retinue plays shadow games.
Neptune and Mars. About an hour after sunset on Monday, January 19, look towards the southwestern sky for Venus and Mercury hanging near the horizon. Look higher up to see the ruddy beacon of Mars.
Telescopes trained on the red planet will reveal the very faint and tiny aquamarine disk of Neptune only 0.2 degrees north. The distant ice giant present quite a color contrast with ruddy Mars.A stunning celestial trio low in the southwest sky forms this week with the crescent moon, Venus and Mercury.
Lunar Triangle. Just after the sun sets on Wednesday, January 21, gaze towards the thin crescent moon, which rests low in the sky toward the western horizon.
Joining it in a stunning triangular formation, and particularly eye-catching through binoculars, are the two innermost planets in our solar system, Mercury and Venus.
The waxing moon acts as a wonderfully convenient guide to spotting these two worlds.
Moon meets Mars. On Thursday, January 22, Earth’s lone natural satellite rises higher in the sky and pays a visit to the red planet. The curl of the moon's crescent will almost seem to point to Mars, just off to its left.
And wait just one more day, on Friday, January 23, when the moon will continue its journey across the sky, climbing higher to form a straight line connection with Mars and Venus. The dawn star will hang below its two companions, just above the horizon.
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This skychart shows the moon pointing to Uranus in the early morning western sky.
Skychart by A. Fazekas/SkySafari
Moon and Uranus. After night falls on Sunday, January 25, look for the moon pairing up with the seventh planet from the sun, Uranus.
The two solar system objects will reside only 7 degrees apart, making them just fit into the same field of view in binoculars.
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Look for Jupiter in the early morning southeast sky and with a telescope soak in a triple Jovian moon shadow transit.
Skychart by A. Fazekas/SkySafari
Triplet Jovian Eclipse. In the early morning hours of Saturday, January 24, telescopes will reveal a trio of tiny black dots trekking across the face of Jupiter.
Three of the gas giant’s moons, Calisto, Io, and Europa all cast their shadows tight on the cloud tops of Jupiter at once starting at 1:27 am EST to 1:53 am .
Happy hunting!
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Crashed spaceship pilot unaware co-pilot unlocked brake
Pilot Peter Siebold told the National Transportation Safety Board that he was not aware co-pilot Mike Alsbury had pulled a brake-unlocking lever before the rocket designed one day to fly tourists to the edge of space was done accelerating. Seconds later, SpaceShipTwo began to disintegrate over Southern California.
Protocol for the flight was to announce the unlocking, an agency spokesman said.
It is not clear if Siebold didn’t hear Alsbury or the co-pilot never indicated he was taking the action. The safety board plans to analyze flight audio next week, spokesman Eric Weiss said.
Virgin Galactic and said it could not comment on the investigation and referred questions to the NTSB. Siebold has not spoken publicly.
Pilots and co-pilots typically agree in advance before making important decisions, said Michael Lopez-Alegria, a former space shuttle astronaut who now consults on commercial space flight. One method is a “challenge and response” system in which one voices an intended action and the other confirms it before the action is taken.
Lopez-Alegria said he did not know whether the unlocking of SpaceShipTwo’s brakes was considered critical enough to require agreement, but “you would never take that action on your own.” He noted that in the cockpit of a commercial airliner, the pilot and co-pilot call out and confirm an action as routine as raising the wheels after takeoff.
The Oct. 31 crash about 120 miles north of downtown Los Angeles killed Alsbury, injured Siebold and cast a shadow over the immediate future of space tourism. It could take a year for the NTSB to determine the cause, though Virgin Galactic CEO George Whitesides said last week the company wants to resume test flights as early as next summer with a replacement craft.
The eventual goal is to launch spaceships carrying six passengers from a spaceport in New Mexico. For their $250,000 ticket, passengers would get a fleeting feeling of weightlessness and a spectacular view of Earth from about 62 miles up.
Pilot Siebold was hospitalized after the crash, but when he spoke to investigators Friday he had been discharged.
He told them that he was flung from the vehicle when it disintegrated. He said he unbuckled from his seat at some point during his fall that began miles above Earth, and his parachute deployed automatically.
Investigators have not revealed the exact altitude of the breakup, but previous SpaceShipTwo test flights peaked at about 10 miles, much lower than the height expected for commercial flights.
Co-pilot Alsbury could be seen on inflight video unlocking the system before the vehicle had reached Mach 1.0, Hart has said. The feathers aren’t supposed to be unlocked until the craft reaches Mach 1.4, or more than 1,000 mph. At that point, it would have reached an altitude where the thinner air would not have provided so much violent resistance.
Even after Alsbury unlocked them, the feathers were not supposed to move. For that to happen, the crew would pull a second lever. The crew didn’t take the second step, but the system engaged anyway. Two or three seconds later, the craft began to break apart.
The NTSB has said the feathers could have deployed because of aerodynamic forces on the craft. The agency said Wednesday that it is looking at those forces and reviewing safety documentation and the feather system’s design.
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Associated Press writers Brian Melley and John Antczak contributed to this report.