Asaph Hall, an American astronomer, discovered two small moons circling the planet Mars in 1877. They were later named Phobos and Deimos after the Greek for ‘fear’ and ‘panic’. But it was excitement, rather than fear and panic, that characterized the close encounter ESA’s Mars Express spacecraft
Mars is kept company by two cratered moons—an inner moon named Phobos and an outer moon named Deimos. Credit: NASA/JPL-Caltech/University of Arizonain 1877. They were later named Phobos and Deimos after the Greek for ‘fear’ and ‘panic’.ESA’s Mars Express spacecraft
“We didn’t know if this was possible,” says Simon Wood, Mars Express flight controller at ESA’s ESOC operations center, who oversaw the upload of the new software to the ESA spacecraft. “The team tested a few different variations of the software, with the final, successful tweaks uploaded to the spacecraft just hours before the flyby.”, sends low-frequency radio waves toward Mars or Phobos, using its 40-meter-long antenna.
For Mars, this could reveal different layers of ice, soil, rock, or water. However, the internal structure of Phobos is much more of a mystery, and the upgrade to MARSIS could offer crucial insight.
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Evidence of ancient Mars ocean increases probability of past lifeRobert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter sciencef1rst.
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