Not exact matches
Radar
soundings point to huge deposits of carbon dioxide near the
Red Planet's south pole, which may have once contributed to a different climate
Deep trenches, unexplored surfaces and a long, treacherous journey:
Sounds like a voyage to Mars, but it also describes the trip to the bottoms of Earth's own oceans, about which we know even less than the
Red Planet.
Mars Express» antenna booms form the probe's Mars Advanced Radar for Subsurface and Ionosphere
Sounding (MARSIS) instrument, a ground - penetrating radar designed to peer beneath the
red planet's surface and scan for deposits of water or ice.