Sunday, 2 October 2011

A meteor?s residual tale Bad Astronomy

Randy Halverson is really a digital photographer who makes stunning time lapse videos from the evening sky (like Tempest Milky Way and Flatlands Milky Way seriously, should you haven t seen individuals, go watch them now). He s presently along the way of creating a brand new video, and within the frames he happened to trap a vibrant meteor, a little of cosmic fluff using up because it rammed through our atmosphere. What s neat relating to this particular incident would be that the meteor left out a glowing streak that survived for more than 30 minutes!

You can observe it there, the red-colored twisty earthworm in the upper left, over the glow from the Milky Way [click to enbolidenate.]

Technically, that's known as a persistent train, also it s not really smoke. Like a meteoroid (the particular solid slice of material) blasts with the air, it ionizes the gases, draining electrons using their parent atoms. Because the electrons gradually recombine using the atoms, they emit light this is the way neon signs glow, in addition to giant star-developing nebulae in space. Top of the-level winds coming that high (up to 100 km/60 miles) produce the twisting, fantastic shapes within the train. The particular particulars of the salt water evaporates in meteor trains aren't well understood, mainly since they're so desperately to place and focus. This is tough to point a telescope in a position on the horizon whenever you do not know where or whenever a meteor will go through!

Here s the frame of times lapse Randy required that shows the meteor because it burned up (again, click to embiggen). Observe that within the hi-res shot you are able to already begin to see the train that created after the meteor vanished, however in this time around exposure you can observe both concurrently.

I ll note this is not necessarily friction that triggers a meteor to lose up. The majority of the heating is because of the meteoroid s hypersonic passage through air, which compresses the gas, heating up strongly. The warmth touches the rock (or metal) within the meteoroid, which in turn blows off, abandoning a train that fades quickly. However the glow in the ionized gas takes considerably longer to decay, departing the persistent train.

Very awesome, and incredibly pretty. I'm able to t wait to determine the recording when Randy s completed with it!

Image credit: Randy Halverson, from his site DakotaLapse, combined with permission. You are able to follow Randy on the internet+ too.


Related posts:

- Another jaw-shedding time lapse video: Tempest
- Gorgeous Milky Way time lapse
- The fiery descent of Atlantis seen from space!
- Meteor propter hoc

October second, 2011 11:44 AM Tags: meteor, persistent train, Randy Halverson, time lapse
by Phil Plait in Astronomy, Awesome stuff, Pretty pictures, Top Publish 6 comments Feed Trackback >



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