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TechnologyNASA Takes Groundbreaking Photos of Mars' Weirdest Moon

02:55  14 may  2019
02:55  14 may  2019 Source:   popularmechanics.com

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NASA Spacecraft Takes Groundbreaking Phobos Photos . NASA ’s Mars Odyssey orbiter has captured the best view of the planet’s moon Phobos yet. The image, which depicts Phobos in its full moon phase, gives us one of the best views of this strange moon that we've ever seen.

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NASA Takes Groundbreaking Photos of Mars' Weirdest Moon© ANDRZEJ WOJCICKI - Getty Images Is Phobos an asteroid

NASA’s Mars Odyssey orbiter has captured the best view of the planet’s moon Phobos yet. The image, which depicts Phobos in its full moon phase, gives us one of the best views of this strange moon that we've ever seen.

Phobos is the biggest moon orbiting Mars, but that isn’t saying much: At only about seven miles across, it's really more of a large asteroid than a proper moon. In fact, many astronomers suspect Phobos was once an asteroid that Mars snatched up and then made its moon.

Because of its small stature, scientists have struggled to properly study Phobos. Short of landing on the moon or placing a spacecraft in orbit around it, the best we can do is take some distant pictures. And now, thanks to the new photo series, we can actually start to learn something about it.

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The Mars Reconnaissance Orbiter used its High Resolution Imaging Science Experiment camera to capture a new breathtaking telescopic image of Earth and the

NASA Takes Groundbreaking Photos of Mars' Weirdest Moon© NASA/JPL-Caltech/ASU/SSI The collection of thermal images of Phobos, taken by Odyssey as the moon rotates.

For instance, the Odyssey's thermal camera took this collection of photos with the Sun directly behind Phobos. These images highlight temperature differences in various regions of the asteroid and hint at Phobos' true makeup. Rocky materials have different temperature signatures than metals like iron and copper, so the snapshots reveal a great deal about Phobos’ composition.

While many scientists suspect Phobos is a captured asteroid, it’s also possible the moon is a chunk of Mars itself knocked into space by a distant asteroid impact. Scientists could help settle the debate by determining what the moon is actually made of and whether its composition matches that of Mars.

But this is the most we’ll likely learn about Phobos for several years, at least until Japan’s upcoming Martian Moons eXploration (MMX) orbiter enters the picture. That orbiter is specifically designed to study the moons of Mars, and is expected to return a sample from one of them sometime next decade. Until then, we’ll have to gather as much as we can from Odyssey.

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NASA's Mars 2020 rover is beginning to take shape. Earlier this month, crews installed some of its legs and six of its wheels. Now, the vehicle needs a name, and for that, NASA is turning to students. Beginning in fall 2019, NASA will run a nationwide "Name the Rover" contest open to K-12 students in the US. The spacecraft will need a name by July 2020, when it's expected to launch. The contest is part of NASA's ongoing effort to engage the public in its Moon to Mars mission, which will search for signs of microbial life, characterize the planet's climate and geology and pave the way for human exploration.

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