video of meteor hitting moon

[Martin]

rather small meteor impact on moon caught in video

 

http://science.nasa.gov/headlines/y2006/13jun_lunarsporadic.htm?list45222

 

4 tons of TNT

 

brief picture of the fireball

 

looks tiny on the face of the moon

[Externet]

And... how does a fireball happen when there is no oxigen?

[Martin]

And... how does a fireball happen when there is no oxigen?

 

rock vaporizes, some even ionizes-----so much energy delivered to relatively small amount of material

[insane_alien]

well you would describe the sun as a fire ball but theres no oxygen(well, a little) there either. a flame is just ionized gas anyways.

[ecoli]

very cool, thanks for sharing.

[dirtyamerica]

And... how does a fireball happen when there is no oxigen?

 

Nothing is "burning". The impact is emitting energy, some of it in the form of visible light.

[herpguy]

Why did the fireball dissapear in just 4/10 of a second? Shouldn't it last a few seconds, even if it was only 10 inches wide?

[insane_alien]

Why did the fireball dissapear in just 4/10 of a second? Shouldn't it last a few seconds, even if it was only 10 inches wide?

 

well, expanding gasses drop in temperature extremely rapidly. the moon has an atmospheric pressure of zero(practically), the pressure of the fireball is probably a few tens of atmospheres, its a few thousand K, its gonna expand FAST and hence cool to the point where the emissions are invisible. and any emissions in the visible spectrum will be to spread out and dim to be visible from earth.

[herpguy]

well, expanding gasses drop in temperature extremely rapidly. the moon has an atmospheric pressure of zero(practically), the pressure of the fireball is probably a few tens of atmospheres, its a few thousand K, its gonna expand FAST and hence cool to the point where the emissions are invisible. and any emissions in the visible spectrum will be to spread out and dim to be visible from earth.

So if a meteorite of that size somehow slid through the atmosophere without burning up would the fireball last longer?

[insane_alien]

technically, yes. but the difference would be practably imperceptible.

[silkworm]

AHHHH! I was looking for this video.

 

I should have just came here.

 

Is this the only one of it's kind you're aware of, Martin?

[Martin]

 

Is this the only one of it's kind you're aware of' date=' Martin?[/quote']

 

only one I know of, silkworm

 

find any other home movies of a meteor fireball on the moon, let me know

 

regards