Editing Talk:2345: Wish on a Shooting Star

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Meteors relative speed to Earth is surely high. However, note that Earth's orbital speed is 29.78 km/s, while the average orbital speed of meteoroids is 20km/s. In many cases it's therefore Earth which hits the meteors with it's high orbital speed ... -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 00:37, 13 August 2020 (UTC)
 
Meteors relative speed to Earth is surely high. However, note that Earth's orbital speed is 29.78 km/s, while the average orbital speed of meteoroids is 20km/s. In many cases it's therefore Earth which hits the meteors with it's high orbital speed ... -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 00:37, 13 August 2020 (UTC)
That's wrong, because no matter how low the relative velocity is, as the asteroid falls through Earth's gravity well, its going to accelerate to escape velocity at the very least. So its going to hit at 11km/s+ at a minimum if it hits the earth. Get your facts right.
 
 
: A laughable claim, Mister Bond, perpetuated by overzealous teachers of science.
 
: A laughable claim, Mister Bond, perpetuated by overzealous teachers of science.
 
: (The unsigned comment above looked to be continued in the unsigned comment below, until I came here to day something and saw they were separate. Hey, people...) It would help if you could say "average at 20km/s ''whilst crossing Earth's orbit''...", because averaged across its entire track might include a lot of drifting around 'out there' and maybe zooming by (or not) during the perihelion segment. And then you only need to worry about retrograde ones (20+29.78, for a palpably mutual hit) and all kinds of other directions of cross, not just ones obviously aphelioning at 1AU in a relatively recently induced orbit that is about to end. Someone must have a table of (known/calculated) closing speeds, as well as directional components defined to Earth's frame-of-reference. [[Special:Contributions/141.101.98.132|141.101.98.132]] 04:08, 13 August 2020 (UTC)
 
: (The unsigned comment above looked to be continued in the unsigned comment below, until I came here to day something and saw they were separate. Hey, people...) It would help if you could say "average at 20km/s ''whilst crossing Earth's orbit''...", because averaged across its entire track might include a lot of drifting around 'out there' and maybe zooming by (or not) during the perihelion segment. And then you only need to worry about retrograde ones (20+29.78, for a palpably mutual hit) and all kinds of other directions of cross, not just ones obviously aphelioning at 1AU in a relatively recently induced orbit that is about to end. Someone must have a table of (known/calculated) closing speeds, as well as directional components defined to Earth's frame-of-reference. [[Special:Contributions/141.101.98.132|141.101.98.132]] 04:08, 13 August 2020 (UTC)

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