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Where Earth's water comes from, preparing for DART impact and other lessons from space 5nvklj





Where Earth's water comes from, preparing for DART impact and other lessons from space 9tpt39

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Where Earth's water comes from, preparing for DART impact and other lessons from space

Dragon
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Where Earth's water comes from, preparing for DART impact and other lessons from space Empty Where Earth's water comes from, preparing for DART impact and other lessons from space

Post by Dragon Tue Oct 12, 2021 4:25 am

A Northern Arizona University researcher who studies active asteroids, which are rare asteroids with comet-like tails, presented groundbreaking research today at the annual meeting of the Division for Planetary Sciences, a branch of the American Academy of Sciences.

Active asteroids hold clues about the origins of water on Earth and where water can be found today in the solar system.

Fewer than 30 of these objects have been discovered since 1949. Most recently, asteroid (248370), also known as 2005 QN173, was found to be active on July 7.


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Where Earth's water comes from, preparing for DART impact and other lessons from space 334pu7m
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Post by Dragon Tue Oct 12, 2021 4:26 am

Where Earth's water comes from, preparing for DART impact and other lessons from space 3-asteroid

The team has submitted their discovery to Michael Rudenko at the International Astronomical Union's Minor Planet Center with the goal of (248370) 2005 QN173 be designated a comet; they're hoping for a somewhat more memorable moniker, Chandler said.

"Recurrent activity is often caused by ices sublimating, similar to what dry ice does here on Earth," Chandler said.

"This is a very rare discovery; it's only the eighth recurrently active asteroid known to date."


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Where Earth's water comes from, preparing for DART impact and other lessons from space 334pu7m
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Post by Dragon Tue Oct 12, 2021 4:27 am



Where Did Earth's Water Come From?


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Where Earth's water comes from, preparing for DART impact and other lessons from space 334pu7m
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Post by Dragon Tue Oct 12, 2021 4:29 am



DART, NASA's First Planetary Defense Test Mission

NASA's first flight mission for planetary defense, the Double Asteroid Redirection Test (DART) seeks to test and validate a method to protect Earth in case of an asteroid impact threat.

The DART mission aims to shift an asteroid's orbit through kinetic impact – specifically, by smashing a spacecraft into the smaller member of the binary asteroid system Didymos.

The Didymos asteroid system is comprised of Didymos and its small, orbiting moonlet, Dimorphos. In 2022, DART will pummel into the latter, a boulder about 160 meters (525 feet) in diameter, and change its orbital period around Didymos by about 10 minutes.

Using ground-based telescope observations prior to and after impact, scientists will be able to compare Dimorphos’ path around Didymos to determine how much the orbit has changed.

Launching in 2021, the DART mission is designed to demonstrate a critical planetary defense capability.


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Post by Dragon Tue Oct 12, 2021 4:33 am



Preparing NASA's DART Spacecraft for Space


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