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Questions tagged [collision]

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What does "Secondary reflection from Didymos may allow imaging of the night side of Dimorphos" mean? Why useful? Imaged from where?

@ConnorGarcia's "impactful" answer to Why did they decide to hit Dimorphos in the retrograde direction rather than prograde; was it a "coin-toss" or were there implications for ...
uhoh's user avatar
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3 votes
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Other side of Earth when the Dinosaur-killer struck

When the (Chicxulub) asteroid hit Yucatan, what was it like in the minutes, days and weeks afterward on distant locations on Earth? Related How loud was the asteroid that killed the dinosaurs?
stretch's user avatar
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2 votes
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Question about plasma parameter

As we know, the deflection angle in strongly ionized plasma can be written as $$ \tan \frac{\theta}{2} = \frac{l_0}{l}, $$ where $\theta$ is the deflection angle, $l_0$ is the impact parameter when $\...
Sung's user avatar
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2 votes
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How common is it for large objects (few kilometers wide) in a young protoplanetary disk or debris disk to collide with one another?

If enough time has passed for gravitational forces to allow the formation of planetesimals(proto-planets) in orbit around the proto-star, how likely is it that two of them would collide with one ...
Ammanuel's user avatar
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2 votes
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Would the WISE Survey pick up a large planetary collisions like Theia-Earth? And from how far?

WISE or Wide-Field Infrared Survey Explorer Large body collisions are obviously, very very rare, locally speaking, and with stars, often spiraling inwards not direct collisions. I know that stellar ...
userLTK's user avatar
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1 vote
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Is the Condor Galaxy (NGC 6872) the result of a non-collision galaxy interaction?

All the interacting galaxies that I can find are of collisions, I'm trying to find an example of a fly-by galaxy interaction. Is the Condor Galaxy an example of one? Wikipedia's NGC 6872; Possible ...
MiscellaneousUser's user avatar
1 vote
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Will the United States Presidential Election (day asteroid) be back soon?

My google news feed is awash with mono-themed articles, including a near Earth asteroid that passed by around election day 2020 in the US. We can all hope that neither will lead to an extinction level ...
uhoh's user avatar
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