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Old 8th November 2018, 11:56 AM   #41
Horatius
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Originally Posted by Hellbound View Post
*Hellbound pulls out a rolled up newspaper*

Bad Elagablus! Bad!


Yeah, we're trying to have a serious discussion of alien space probes, here!

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Old 8th November 2018, 11:57 AM   #42
Elagabalus
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Originally Posted by Molinaro View Post
The paper suggests a thickness of 0.9 to 0.3 mm.
It does nothing of the kind! Paper is standardized to be 0.1 mm thick!
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Old 8th November 2018, 12:22 PM   #43
Hellbound
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Originally Posted by Horatius View Post
Yeah, we're trying to have a serious discussion of alien space probes, here!

I was probed once.

He never called me back after
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Old 8th November 2018, 12:24 PM   #44
Horatius
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Originally Posted by Elagabalus View Post
It does nothing of the kind! Paper is standardized to be 0.1 mm thick!


But that might not be the case with alien paper, you Earthist!
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Old 8th November 2018, 12:50 PM   #45
The Great Zaganza
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Originally Posted by Horatius View Post
But that might not be the case with alien paper, you Earthist!
When my grandfather came over here from Mars, he came to work, he never abducted anyone.
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Old 8th November 2018, 02:07 PM   #46
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Originally Posted by The Great Zaganza View Post
When my grandfather came over here from Mars, he came to work, he never abducted anyone.
But he probed someone.

Your grandmother!
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Old 8th November 2018, 02:21 PM   #47
Elagabalus
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Originally Posted by Horatius View Post
But that might not be the case with alien paper, you Earthist!
Oh, for the love of Mother Gaia! I cannot fathom how you came to that conclusion and decided to tar me with such a hateful term!*


*Just so you know, I consider anything Class M to be perfectly respectable.
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Old 8th November 2018, 03:42 PM   #48
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This, from astrobites, is worth reading: No, astronomers did not just claim that ‘Oumuamua is an extraterrestrial probe
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Old Yesterday, 02:50 PM   #49
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Originally Posted by arthwollipot View Post
There are certain physical laws that even alien technology must adhere to. One of them is that more photons hitting an object will exert more force on it. A bigger light sail will be more efficient and effective than a small one, and make it go faster. No amount of alien technology will change that.

I think what Molinaro is asking is, would they be capable of building a light sail wider than 50m? If bigger is better, then why can't we build a light sail that is 20,000,000 km wide. Perhaps its because we don't have the necessary resources to do so.

Originally Posted by Elagabalus View Post
The solar sail is actually a drag chute capturing the flow of the Dark in order to slow down to impulse power.
Furchrissakes, don't tell that to Pixie of Key!!!!
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Old Yesterday, 03:01 PM   #50
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Originally Posted by arthwollipot View Post
There are certain physical laws that even alien technology must adhere to. One of them is that more photons hitting an object will exert more force on it. A bigger light sail will be more efficient and effective than a small one, and make it go faster. No amount of alien technology will change that.
That isn't true as a generality. If it's a sail plus a payload, and payload isn't a sail, then it will be true. But this article is proposing this is just a sail with no separate payload. In that situation the efficiency will likely decrease as the sail gets large because the mass will likely not scale linearly.

In the ideal case the area of the sail will scale directly proportional to the mass. So the force to mass ratio would be constant. No increase in efficiency.
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Old Yesterday, 05:47 PM   #51
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An interesting article here about the possible origins of Oumuamua

https://astrobites.org/2017/12/20/on...itor-oumuamua/
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Old Yesterday, 08:16 PM   #52
arthwollipot
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Originally Posted by RecoveringYuppy View Post
That isn't true as a generality. If it's a sail plus a payload, and payload isn't a sail, then it will be true. But this article is proposing this is just a sail with no separate payload. In that situation the efficiency will likely decrease as the sail gets large because the mass will likely not scale linearly.

In the ideal case the area of the sail will scale directly proportional to the mass. So the force to mass ratio would be constant. No increase in efficiency.
It's also tumbling, which is not an ideal state for a light sail.
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Old Yesterday, 11:09 PM   #53
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The light sail could be huge in relation to its crew. Perhaps the inhabitants are of a size where they could simply be entirely swallowed by a small dog.
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Old Today, 12:12 AM   #54
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Originally Posted by alfaniner View Post
The light sail could be huge in relation to its crew. Perhaps the inhabitants are of a size where they could simply be entirely swallowed by a small dog.
Well that would be your fault wouldn't it. I mean, if you hadn't said that you seem to be having tremendous difficulty with your lifestyle, that would never have happened!
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Old Today, 08:30 AM   #55
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If it were spinning like a bullet, maybe, but tumbling, a lot less of a maybe
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