Fresh imagery from Europe’s Mars Express orbiter shows the Martian moon Phobos in sharp, 3-D detail. This isn’t the first time Phobos has gotten its close-up, but interest in the irregular moon is rising – in part because it’s increasingly seen as a steppingstone for Mars-bound astronauts.
Last month, NASA shifted its focus from sending humans back to the moon to a “flexible path” that includes the moons of Mars as potential destinations. The idea is that low-gravity locales such as Phobos (and Mars’ other moon, Deimos) should be easier to get to because they’re more accommodating for landing and ascent.