After greater than a decade on Mars, NASA’s Curiosity rover is kind of used to traversing the Purple Planet in solitude.
However final week, on its 3,724th Martian day rumbling over Mount Sharp, it encountered one other international customer, one thing that additionally traveled a unprecedented distance by means of area earlier than winding up within the dusty barren desert: a one-foot-wide meteorite.
NASA is looking the area rock Cacao(Opens in a brand new window), considered one of a handful of meteorites the plucky robotic has found because it arrived on Mars in 2012. Utilizing its Mast Digital camera, Curiosity snapped a photograph displaying its new discover on Jan. 27, with its personal Johnny-5-like shadow making a body. The selfie [see below] has ragged edges as a result of it’s truly composed of six pictures stitched collectively.
“There’s no approach to date these,” NASA mentioned by means of its anthropomorphized Curiosity account(Opens in a brand new window) on Twitter. “Nevertheless it may have been right here thousands and thousands of years!”
An unlimited Martian cloud returns each spring. Scientists came upon why.
Curiosity’s shadow casts a body across the newly found meteorite on Mars.
Credit score: NASA / JPL-Caltech / MSSS
On Earth, scientists estimate about 48.5 tons of billions-of-years-old meteor materials(Opens in a brand new window) rain down from area every day, a lot of which vaporizes within the ambiance or falls into the ocean, which covers over 70 p.c of the planet. Greater than 60,000 meteorites have been found on our planet. The overwhelming majority comes from asteroids, however treasured few originated on Mars or the moon, in response to NASA. A minimum of 175 recognized right here(Opens in a brand new window) hail from the Purple Planet.
“It may have been right here thousands and thousands of years!”
Curiosity, a car-size rover(Opens in a brand new window), and its predecessors have discovered meteorites earlier than, and The Meteoritical Society is beginning to preserve a database of their finds(Opens in a brand new window). The worldwide group has given formal title recognition to fifteen such specimens since 2005.
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It isn’t clear which planet, moon, or asteroid Cacao expatriated, however mission scientists say it is an iron-nickel meteorite. This class of area rock is not uncommon amongst these discovered on Earth, however it’s much less widespread than stony meteorites. Different meteorites that rovers have found on their expeditions have had related iron compositions.
Scientists speculate iron meteorites could also be immune to erosion on the Purple Planet. That would clarify why this massive area rock seems to be sitting on flat floor relatively than in a gap.
“There doubtless was a BIG crater within the historic previous,” Curiosity tweeted(Opens in a brand new window). “Over time, erosion and different forces flatten the realm round it, carving away every thing however the hardest materials.”
