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To MARS with MER - MARS the Planet
MARS the Planet
Images courtesy of NASA/JPL/Malin Space Science Systems
This giant volcano, Olympus Mons, is 3 times higher than Mount Everest, and as wide as Arizona.
A huge rift valley, "Valles Marineris", is so long it would stretch clear across the United States, and it's 4 times deeper than the Grand Canyon.
Images courtesy of NASA/Mars Orbiter Laser Altimeter (MOLA) Team
Images courtesy of NASA's Jet Propulsion Laboratory
In the 1970's spacecraft orbiting Mars sent back images that looked like river valleys, as if they'd been carved by flowing water. But Mars in modern times is very cold, with nighttime temperatures falling to one hundred below. And its atmosphere is now so thin that liquid water can't last on its surface.
