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April 15, 2009 03:46:10 Mars 28' south of Uranus 30.9° West April 18, 2009 16:22:43 Venus 5°36' north of Mars 29.8° West May 25, 2009 14:20:29 Jupiter 24' south of Neptune 98° West June 19, 2009 14:16:32 Venus 2°02' south of Mars 44.6° West July 13, 2009 17:22:12 Jupiter 37' south of Neptune 145.5° West August 18, 2009 21:20:26 Mercury 3 ...
April 6, 2009 () 1636 #09-15 "Moon Hop To Find Jupiter, Venus And Mars And An Occult Occurrence For Some Of You"--Jack Horkheimer: April 13, 2009 () 1637 #09-16 "Mercury At Its Best For 2009 Joined By The Moon And The Seven Sisters Plus Celebrate National Astronomy Day On Saturday May 2nd"--Jack Horkheimer
An observer on Mars would be able to see the Moon orbiting around the Earth, and this would easily be visible to the naked eye. By contrast, observers on Earth cannot see any other planet's satellites with the naked eye, and it was not until soon after the invention of the telescope that the first such satellites were discovered ( Jupiter 's ...
Phobos could be a second-generation Solar System object that coalesced in orbit after Mars formed, rather than forming concurrently out of the same birth cloud as Mars. [69] Another hypothesis is that Mars was once surrounded by many Phobos- and Deimos-sized bodies, perhaps ejected into orbit around it by a collision with a large planetesimal. [70]
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If Mars is in conjunction with the Sun, there is often a triple conjunction between Mars and Mercury or between Mars and Venus. In the events in which Mercury is involved, the second conjunction is invisible because of small elongation from Sun; both other events are difficult to see because of the nearness to horizon and the relatively low brightness of Mars, which is there always near its ...
In August 1877, the American astronomer Asaph Hall discovered the two moons of Mars using a 660 mm (26 in) telescope at the U.S. Naval Observatory. [55] The names of the two satellites, Phobos and Deimos , were chosen by Hall based upon a suggestion by Henry Madan , a science instructor at Eton College in England.
The THEMIS instrument, before being mounted onto Mars Odyssey. The Thermal Emission Imaging System (THEMIS) is a camera on board the 2001 Mars Odyssey orbiter. It images Mars in the visible and infrared parts of the electromagnetic spectrum in order to determine the thermal properties of the surface and to refine the distribution of minerals on the surface of Mars as determined by the Thermal ...