Astronomy Picture of the Day . Three Planets in Dawn Skies . ... Credit: Tunc Tezel Explanation: Three children of the Sun rise in the east in this peaceful dawn skyview recorded December 7th near Bolu, Turkey. Inner planet Mercury , fresh from its second transit of the 21st century, stands highest in the bright sky at the top right. Gas giant Jupiter lies below the cloud bank near picture center. A newsworthy Mars is also visible, right of Jupiter and just above the dark cloud bank. ...

... 2003 December 24 . Layered Hills on Mars . Credit: MSSS , JPL , NASA . Explanation: Why are some hills on Mars so layered? ... Clearly, dark windblown sand surrounds outcropping of light sedimentary rock across the floor of crater Arabia Terra . ... Blown sand possibly itself eroded once-larger mesas into the layered hills. ... The above image , showing an area about 3 kilometers across, was taken in October by the Mars Global Surveyor spacecraft currently orbiting Mars . ... About APOD | ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . ... Mercury Magazine . ... White Mars: The Story of the Red Planet Without Water . ... Mars today is a dry planet, with an atmospheric pressure far too low to sustain liquid water on the surface. ... Hoffman describes his White Mars theory, and the reasons why the warm and wet model doesn't hold water. In Hoffman's view, Mars is a planet dominated by carbon dioxide, not water. ...

... Noctis Labyrinthus (Image credit: NASA/JPL/University of Arizona) . ... Gale Crater (Image credit: NASA/JPL/University of Arizona) . ... Crater in Isidis region (Image credit: NASA/JPL/University of Arizona) . ... Meridiani Planum Crater (Image credit: NASA/JPL/University of Arizona) . ... Northern Meridiani (Image credit: NASA/JPL/University of Arizona) . ... Cerebus Fossae (Image credit: NASA/JPL/University of Arizona) . ... Dust dunes (Image credit: NASA/JPL/University of Arizona) . ...

Software Forum Message . ... VRMars-Spirit - The Red Planet Mars 3D - VR Software On The MER . ... I would like to inform you about my astronomy software VRMars-Spirit - The Red Planet Mars 3D presenting the Mars Exploration Rover Spirit Mission with the aid of virtual reality. ... VRMars-Spirit - The Red Planet Mars 3D's screen shots: . ... www.astronomy.net . ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Life Under the Moon . ... Seeing Jupiter's Moons . ... Time Zones and the Spherical Earth . A Companion to the Earth? ... December 19, 1999) . ... Big Moon, Little Moon . ... How Big is the Moon? ... 14, 2000) . ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! Talk about Bad Astronomy on the BA Bulletin Board! ...

... Events . ... The orbit of the Moon is too small to be seen on this scale, but the 2008 December 1st alignment was especially interesting because additionally Venus was occulted by the Moon (this occultation was visible from Europe and NW Africa). Some more photos of the 1 December events received from Jonathan Bingham . ... Venus coming out from behind the Moon; photograph by Jonathan Bingham . ISS; photograph by Jonathan Bingham . ... International Year of Astronomy, Ireland National Node . ...

Why do people want to explore Mars? At the present time Mars topography is known sufficiently well to make a Martian map; we cannot distinguish yet the settlements of the inhabitants of this planet, but sooner or later we probably will be able to achieve this as well.. ... US spacecraft "Mariner-4" performed the first successful flyby and transmitted to the Earth twenty one photos of Mars' surface. ... It is supposed that large subsurface ice reservoirs or liquid water exist on Mars. ...

... STScI-PRC99-27 A CLOSER ENCOUNTER WITH MARS Taking advantage of Mars's closest approach to Earth in eight years, astronomers using NASA's Hubble Space Telescope have taken the space-based observatory's sharpest views yet of the Red Planet. ... In these views the north polar cap is tilted toward the Earth and is visible prominently at the top of each picture. ... Dark sand dunes that surround the polar cap merge into a large, dark region called Acidalia. ...

... Research . ... NASA's "follow the water" philosophy has led me to study atmosphere-regolith interactions on Mars in search for locations and times where liquid water is available. ... Transient liquid water and water activity at Gale crater Mars. ... Rivera-Valentin, E. G. , Chevrier, V. F., 2015. ... Icarus , 253, 156-158. Lopez Garcia, E. J., Rivera-Valentin, E. G. , Schenk, P. M., Hammond, N. P., Barr, A. C., 2014. ... Icarus , 237, 419-421. ... Chevrier, V. F., Rivera-Valentin, E. G. , 2012. ...