He quickly learns that gravity on Mars is much less than on Earth.

VOA: special.2010.07.17

"Why should we do something when we've already done it." "Going to the moon or going to Mars is about as interesting to people as say going to Antarctica."

VOA: standard.2010.04.15

Marc Rayman says Vesta appears to have a layered structure, one that is similar to planets like Earth, Mars and Venus.

VOA: special.2011.07.27

Mars Day at the Smithsonian Air and Space Museum in Washington is a celebration of our solar system's most famous planet.

VOA: special.2010.07.28

Another robot is designed to move and turn in a way that is similar to the Mars rovers.

VOA: special.2010.07.28

Eight-year-old Sam learned that the ancient description of Mars as red is not exactly right.

VOA: special.2010.07.28

But the goal is to prepare for future robotic and human visits to Mars.

VOA: special.2010.07.28

Steve Squyres is the chief scientist for the American space agency's Mars Rover Project.

VOA: special.2010.05.25

"You'll find something on Earth as close to what is pretty much on Mars.

VOA: special.2010.07.28

It is the first book in a series that Mister Burroughs wrote about a man who travels to Mars during the last years of the eighteen hundreds.

VOA: special.2010.07.10

Michael Meyer is lead scientist for NASA's Mars Exploration Program in Washington.

VOA: special.2009.12.30

"That the closest thing to Mars-the stuff-is from volcanoes mostly."

VOA: special.2010.07.28

This is very similar to Mister Lowell's description of Mars.

VOA: special.2010.07.11

The book is called "A Princess of Mars."

VOA: special.2010.07.10

Mars-500 is the third in a series of interplanetary flight simulations.

VOA: standard.2010.06.02