Two Impacts May Have Formed the Moon
- Graeme1858
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Two Impacts May Have Formed the Moon
It may have taken two tries to make the Moon.
Scientists have long thought that the Moon formed with a bang, when a protoplanet the size of Mars hit the newborn Earth. Evidence from Moon rocks and simulations back up this idea.
But a new study suggests that the protoplanet most likely hit Earth twice. The first time, the impactor (dubbed "Theia") only glanced off Earth. Then, some hundreds of thousands of years later, it came back to deliver the final blow.
https://skyandtelescope.org/astronomy-n ... -the-moon/
Scientists have long thought that the Moon formed with a bang, when a protoplanet the size of Mars hit the newborn Earth. Evidence from Moon rocks and simulations back up this idea.
But a new study suggests that the protoplanet most likely hit Earth twice. The first time, the impactor (dubbed "Theia") only glanced off Earth. Then, some hundreds of thousands of years later, it came back to deliver the final blow.
https://skyandtelescope.org/astronomy-n ... -the-moon/
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Celestron 9.25 f10 SCT, f6.3FR, CGX mount.
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- notFritzArgelander
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Re: Two Impacts May Have Formed the Moon
Very intriguing. Thanks!
PS It turns out that the full paper is open access.
https://iopscience.iop.org/article/10.3847/PSJ/ac19b2
https://iopscience.iop.org/article/10.3847/PSJ/ac19b2
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- helicon
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Re: Two Impacts May Have Formed the Moon
That's cool. A double whammy for early earth.
-Michael
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Refractors: ES AR152 f/6.5 Achromat on Twilight II, Celestron 102mm XLT f/9.8 on Celestron Heavy Duty Alt Az mount, KOWA 90mm spotting scope
Binoculars: Celestron SkyMaster 15x70, Bushnell 10x50
Eyepieces: Various, GSO Superview, 9mm Plossl, Celestron 25mm Plossl
Camera: ZWO ASI 120
Naked Eye: Two Eyeballs
Latitude: 48.7229° N
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