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Old 10-05-2009, 11:37 PM #1
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Default Paint the upper atmosphere...

Not visible directly, but apparently good enough to compensate telescopes for atmospheric interference with... and its just 4 watts

Man-made star shines in the southern sky in Astronomy Physics Videos | Science Flicks


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Old 10-06-2009, 01:37 AM #2
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Default Re: Paint the upper atmosphere...

I wonder if it can light matches!

J/K. Awesome laser though.
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Old 10-06-2009, 10:07 AM #3
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Default Re: Paint the upper atmosphere...

It can't even light a match as a complete system because the beam is expanded to a huge diameter to keep divergence acceptable. The laser before the output telescope would be great though, 4 watts of very pretty orange light - its the sodium line we all know from those orange streetlights.

I suppose these lasers must be very difficut/expensive to construct or operate as you never see them outside astronomy, while their color woud be very desireable for show purposes and such.
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Old 10-06-2009, 10:35 AM #4
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Default Re: Paint the upper atmosphere...

HOLLY CRAP thats awesome! here is some info, you might of missed!

ESO astronomers have been able to create an 'artificial star' 90 km high in the atmosphere, using a laser beam. This star can be put at any point in the sky, and it enables the adaptive optics of the VLT telescope to be used throughout the visible sky. Until now, adaptive optics required the light of a strong natural star as a reference; now, the artificial star will do this. The new technology enlarges the field of vision of the most powerful telescope on Earth
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Old 10-06-2009, 08:22 PM #5
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Default Re: Paint the upper atmosphere...

That's sick!!! Never knew about adaptive optics. Pretty high-tech stuff there.
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Old 10-06-2009, 10:15 PM #6
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Default Re: Paint the upper atmosphere...

...I hav apparently been IP banned from that site.
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Old 10-06-2009, 10:19 PM #7
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Default Re: Paint the upper atmosphere...

Maybe this technology has been in use for some time now, & has been the reason for a lot of "UFO" sightings. If they are able to accomplish this without the lasers 'beam' being visible, it would sure explain a lot of the "UFO" sightings that look like dancing lights in the sky. IDK, just thinkin' while typin' LOL..........rob
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Old 10-07-2009, 02:16 AM #8
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Default Re: Paint the upper atmosphere...

Quote:
Originally Posted by o0ICE0o View Post
...I hav apparently been IP banned from that site.
Same here????
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Originally Posted by www.scienceflicks.com
IP Banned
Lol, never in my life been on that site haha.
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Old 10-07-2009, 07:07 PM #9
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Default Re: Paint the upper atmosphere...

That is one heck of a system. Three minutes twenty for very pretty yellow thin beams.. Wow !! I never thought it could be that useful for astronomy.
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Old 11-23-2009, 02:37 PM #10
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Default Re: Paint the upper atmosphere...

Maybe try re-watching the video with sound?
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Old 12-02-2009, 07:39 PM #11
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Default Re: Paint the upper atmosphere...

That's pretty cool...
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