Tuesday, April 19, 2022

Asteroid 101955 Bennu Has a Young and Impact-Armored Surface | Planetary News

Impact cratering involves the displacement of material when a surface is impacted by an external object at high velocity. Impact cratering occurs frequently on airless solar system bodies, and counting craters can help determine the age of a planetary surface.

Edward Bierhaus (Lockheed Martin) and colleagues analyzed images taken of 101955 Bennu, a rubble-pile asteroid visited by the Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer (OSIRIS-REx) mission.

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A massive asteroid impact may have covered craters on the moon's near side: Study | Technology ...

Scientists believe that the near side of the moon—the only side that we get to see from Earth—may not have as many craters as the other side because of a single massive asteroid that slammed into the moon.

That other side of the moon, also called the dark side of the moon, has over 9000 craters formed due to many asteroid collisions. In sharp contrast, the near side of the moon is dominated by 'lunar mares', which are vast dark coloured remnants of ancient lava flows.

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Publisher: The Indian Express
Date: 2022-04-19T14:00:42 05:30
Twitter: @The Indian Express
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Asteroid Expert Rates 9 Asteroid Disasters in Movies and TV

She looks at "Armageddon" (1998), "Greenland" (2020), "Deep Impact" (1998), "Bruce Almighty" (2003), "Don't Look Up" (2021), "Color Out of Space" (2019), "The Good Dinosaur" (2015), "Ice Age: Collision Course" (2016), and "The Expanse" S5E3 (2020). 

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Publisher: Insider
Date: 2022-04-19
Author: David Ibekwe Ju Shardlow
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Here's the view from a NASA spacecraft bound for Jupiter asteroids | Space

NASA's Lucy spacecraft is early in its long trek to explore a group of asteroids called the Jupiter Trojans, which are small remnants of our early solar system that share the planet Jupiter's orbit around the sun. 

Lucy launched from NASA's Kennedy Space Center in Florida atop a United Launch Alliance (ULA) Atlas V rocket on Oct. 16, 2021, and is preparing for an Earth flyby this fall before it begins its asteroid explorations.

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Publisher: Space.com
Date: 2022-04-19T16:16:36Z
Author: Samantha Mathewson
Twitter: @SPACEdotcom
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Distant asteroid now bears Tagish adventurer Skookum Jim’s name – Yukon News

The asteroid dubbed Skookumjim has a diameter estimated between eight and 19 kilometres in diametre. It takes more than five earth years for it to complete and orbit around the sun.

In 2018, the Yukon Astronomical Society was contacted by the Royal Astronomical Society of Canada to provide a potential name for an asteroid. Their suggestion to name the asteroid after Skookum Jim was accepted by the International Astronomical Union.

Publisher: Yukon News
Date: 2022-04-18T14:30:00-07:00
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Scientists Find Dinosaur Fossils From The Day The Asteroid Struck

At the Tanis dig site in North Dakota, University of Manchester graduate student Robert DePalma led a team that uncovered a number of ancient animals that appear to have perished in the hours following the strike.

“The time resolution we can achieve at this site is beyond our wildest dreams,” Phillip Manning, a professor of natural history at the University of Manchester, and DePalma’s Ph.D. supervisor, told BBC Radio 4, as reported by The Guardian .

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Publisher: All That's Interesting
Date: 2022-04-18T19:45:43 00:00
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EarthSky | Did an interstellar meteor hit Earth in 2014?

Remember in 2017, when the first-ever-known interstellar object – first-known object from outside our solar system – passed through? ‘Oumuamua , as it was later named, became a much-debated and controversial object.

Becky Ferreira at VICE wrote about the surprising update to this meteor story on April 4, 2022. She said the meteor:

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Publisher: EarthSky | Updates on your cosmos and world
Date: 2022-04-18T17:45:18 00:00
Twitter: @earthskyscience
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Here's where planetary science is going in the next decade | Space

The solar system is overflowing with fascinating destinations, but NASA can only operate so many missions.

So every 10 years, the agency asks scientists to evaluate the state of planetary science and determine what questions should be the top priorities for the scientific community.

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Publisher: Space.com
Date: 2022-04-19T15:16:47Z
Author: Meghan Bartels
Twitter: @SPACEdotcom
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What happens if the largest known comet collides with Earth? - Big Think

Out there, in the far recesses of the Solar System, a great existential threat lies in wait for planet Earth: the Oort cloud . Formed at the outset of the Solar System, it largely consists of the remnants of the primitive material that led to the formation of our Sun and the planets.

Today, these bodies, mostly a mix of ice-and-rock, remain in slow, quasi-stable orbits in the deepest recesses of our Solar System. But every once in a while, a chance gravitational encounter will perturb the orbit of a particular object, and send one careening into the inner Solar System.

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Publisher: Big Think
Date: 2022-04-19T21:28:56 00:00
Twitter: @bigthink
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Future of Earth's Defense is Ground-Based Planetary Radar

A new radar system being developed by the National Radio Astronomy Observatory and the Green Bank Observatory will transmit powerful radar signals from the Green Bank Telescope (top right panel) and, in this illustration, bounce those signals off the Moon (middle right).

Newswise — Powerful radar systems have played a major role in the study of planets, moons, asteroids, and other objects in our Solar System for several decades, and now have a “unique role” to play in planetary defense – “providing protection to the nations of the ...

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