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Old 03-28-2018, 07:08 AM   #76
boogabooga
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https://www.nasa.gov/feature/goddard...a-can-teach-us
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Old 03-28-2018, 03:27 PM   #77
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Originally Posted by Notebook View Post
 We should send a robot, drill that asteroid and bottle the water. People would pay a fortune for a Litre.
Alien Bottled Water, big sales(till the side-effects start showing).

N.
And probably the first people in line to pay that fortune would be scientists wishing to analyze it!
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Old 06-30-2018, 01:18 PM   #78
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27 June 2018
An object from another star system that made a brief appearance in our skies guised as an asteroid turns out to be a tiny interstellar comet.
‘Oumuamua, a name that reflects the Hawaiian meaning for ‘a messenger from afar, arriving first’, was discovered by astronomers working with the Pan-STARRS survey in Hawaii in October last year as the object came close to Earth’s orbit. Follow-up observations by ESA’s Optical Ground Station telescope in Tenerife, Canary Islands, and other telescopes around the world helped determine its trajectory.
http://www.esa.int/Our_Activities/Sp...really_a_comet
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Old 11-06-2018, 06:57 PM   #79
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It's Never Aliens... Until It Is

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Old 11-06-2018, 07:42 PM   #80
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Still, it would be very fascinating to ponder, if an alien spaceship wreck just drifted through our solar system... how could we tell it is one?
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Old 11-07-2018, 07:54 AM   #81
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Still, it would be very fascinating to ponder, if an alien spaceship wreck just drifted through our solar system... how could we tell it is one?
We can't without taking a closer look, really. So to be sure that it isn't an alien spacecraft, we would have needed to throw some money at it. Since nobody was willing to do that, Okhams razor is really all that's left.
And it heavily favors the not-alien-spaceship assumption, unless for some reason you assume that alien spaceship wrecks are ridiculously common in the galaxy
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Old 11-07-2018, 08:46 AM   #82
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Originally Posted by jedidia View Post
 We can't without taking a closer look, really. So to be sure that it isn't an alien spacecraft, we would have needed to throw some money at it. Since nobody was willing to do that, Okhams razor is really all that's left.
And it heavily favors the not-alien-spaceship assumption, unless for some reason you assume that alien spaceship wrecks are ridiculously common in the galaxy

Well, that is the question: How could we be "more sure" without visiting it? What kind of observations could be able to tell, that it has non-natural properties?


Could special radar observations do that? It would require a very long observation peroid, longer than what the Arecibo antenna for example could do. We would need a Arecibo in space for that...
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Old 11-07-2018, 09:02 AM   #83
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Well, with that shape it probably isn't a Borg Cube....
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Old 11-07-2018, 10:26 AM   #84
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Originally Posted by Urwumpe View Post
 How could we be "more sure" without visiting it?
Can't we point a laser at it? To check whether we can burn a little hole in it to allow gasses to evaporate and cause a change in it's motion? Then it's most likely an asteroid.

If it doesn't burn easily and turns around headed for earth, then it's an alien spaceship.

There was an article in the news yesterday about a MIT student who proposes to attract aliens using a 1-2 megawatt laser and a 30- 45 meter telescope. That laser beam would be visible at a distance of 20.000 lightyears. That makes me wonder if we could use a laser at a much shorter distance to burn a little hole in an asteroid.

https://news.mit.edu/2018/laser-attr...ers-study-1105
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Old 11-07-2018, 10:42 AM   #85
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Can't we point a laser at it? To check whether we can burn a little hole in it to allow gasses to evaporate and cause a change in it's motion? Then it's most likely an asteroid.
I didn't do the math, but considering the distance I would assume we'd need one hell of a laser to produce an evaporation large enough to measure from here...

Quote:
If it doesn't burn easily and turns around headed for earth, then it's an alien spaceship.
Under those circumstances, I would *not* consider that a positive outcome!

Last edited by jedidia; 11-07-2018 at 10:45 AM.
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Old 11-07-2018, 10:45 AM   #86
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I am pretty sure - even with the ELT mirror, the laser spot on the "target" would have multiple square meters of surface on a target about one AU away.
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Old 11-08-2018, 09:46 AM   #87
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2010 comes to mind:
"Have you checked Discovery's orbit lately?"

Last edited by 4throck; 11-08-2018 at 09:50 AM.
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