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Old 30th November 2017, 07:39 PM   #41
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Originally Posted by Roboramma View Post
I guess that depends on how much warning we had. As I understand it Oumuamua was only discovered on it's way out of the solar system. [...]
Look what you wrote.
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Old 14th December 2017, 02:52 AM   #42
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"Where are we now?"
"Just heading past Earth, sir."
"Already? Oh ****** Turn off engines, turn off everything!"
"...Ok."
*Ship powers down*
"Sir, we're being hailed by the humans."
"Don't reply."
"They seem to want to make contact-"
"Don't. Reply."
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Old 14th December 2017, 05:22 AM   #43
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Lobsang Rampa?
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Old 14th December 2017, 06:09 AM   #44
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Think they'll find anything?

http://www.bbc.co.uk/news/science-environment-42329244
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Old 14th December 2017, 07:23 AM   #45
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Nope. Wishful thinking.
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Old 14th December 2017, 07:40 AM   #46
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So no naked Mathilda May Space Vampire?
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Old 14th December 2017, 07:57 AM   #47
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Originally Posted by alexi_drago View Post

Quote:
"Its properties suggested it originated around another star, making it the first such body to be spotted in our cosmic neighbourhood."
"Its properties" my jewels! It is its velocity: at 1 AU it was like 49 km/s when at such distance the escape velocity for the solar system is like 42 km/s, so the trajectory must be hyperbolic. As it velocity has to have been very high when it was far from the Sun -some 25 km/s when it was at 100 AU, some 18 km/s at 1000 AU (I'm making the calculations in the air)- it is almost impossible that this object originated in the Solar system and acquired such speed just by means of "cosmic billiards".
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Old 14th December 2017, 08:36 AM   #48
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A £75 million programme that searches for evidence of intelligent life beyond Earth called Breakthrough Listen, led by Stephen Hawking, is attempting to detect evidence of alien technology transmitting from the object.
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Old 14th December 2017, 08:43 AM   #49
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Originally Posted by aleCcowaN View Post
"Its properties" my jewels! It is its velocity: at 1 AU it was like 49 km/s when at such distance the escape velocity for the solar system is like 42 km/s, so the trajectory must be hyperbolic. As it velocity has to have been very high when it was far from the Sun -some 25 km/s when it was at 100 AU, some 18 km/s at 1000 AU (I'm making the calculations in the air)- it is almost impossible that this object originated in the Solar system and acquired such speed just by means of "cosmic billiards".
Even having slowed since rounding the Sun, Omuamua's velocity is greater than that of Voyager 1 and certainly high enough to leave the Solar System (no matter where the fence is).
https://upload.wikimedia.org/wikiped...perihelion.png
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Old 14th December 2017, 08:45 AM   #50
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Originally Posted by Scorpion View Post
A £75 million programme that searches for evidence of intelligent life beyond Earth called Breakthrough Listen, led by Stephen Hawking, is attempting to detect evidence of alien technology transmitting from the object.

a) We know, that's what the last few posts have been about

b) Breakthrough Listen is not led by Stephen Hawking, his only involvement with it has been to sign a letter supporting it.
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Old 14th December 2017, 09:16 AM   #51
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Originally Posted by aleCcowaN View Post
"Its properties" my jewels! It is its velocity: at 1 AU it was like 49 km/s when at such distance the escape velocity for the solar system is like 42 km/s, so the trajectory must be hyperbolic. As it velocity has to have been very high when it was far from the Sun -some 25 km/s when it was at 100 AU, some 18 km/s at 1000 AU (I'm making the calculations in the air)- it is almost impossible that this object originated in the Solar system and acquired such speed just by means of "cosmic billiards".

A physicist considers position and momentum as properties. Weak water, but a science reporter may not even grasp it when spoken.

BTW the Wikipedia page suggests is it impossible to be from within the solar system (barring rocket boost by the Crab People) as any unknown planets that may have aided in accelerating it would have to be so far out that their slow speed could not accomplish this.
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Last edited by Beerina; 14th December 2017 at 09:22 AM.
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Old 14th December 2017, 09:31 AM   #52
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Originally Posted by Scorpion View Post
A £75 million programme that searches for evidence of intelligent life beyond Earth called Breakthrough Listen, led by Stephen Hawking, is attempting to detect evidence of alien technology transmitting from the object.
I'll start becoming excited if it displays non-ballistic changes in course.

It is intriguing to think about how we would react if this was to actually happen. Panic? Excitement? Fear? Anticipation? Given the current state of the planet I'm not certain that even it were filled with extraterrestrials coming to Earth to eat us I would view it as the worse thing possible.
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Old 14th December 2017, 09:40 AM   #53
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Originally Posted by Giordano View Post
I'll start becoming excited if it displays non-ballistic changes in course.

It is intriguing to think about how we would react if this was to actually happen. Panic? Excitement? Fear? Anticipation? Given the current state of the planet I'm not certain that even it were filled with extraterrestrials coming to Earth to eat us I would view it as the worse thing possible.
Twitterstorm.
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Old 14th December 2017, 10:25 AM   #54
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Originally Posted by Beerina View Post
A physicist considers position and momentum as properties.
My mistake. A matter of false cognates (a.k.a false friends) in English and Spanish. Hard to me accepting velocity is a property. Is degrees of freedom considered also a property in English?
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Old 17th December 2017, 08:12 AM   #55
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Originally Posted by aleCcowaN View Post
My mistake. A matter of false cognates (a.k.a false friends) in English and Spanish. Hard to me accepting velocity is a property. Is degrees of freedom considered also a property in English?
More specifically an independent property of the object or system can be considered a degree of freedom for that object or system in physics and chemistry.


https://en.wikipedia.org/wiki/Degree...and_chemistry)
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Old 17th December 2017, 11:52 AM   #56
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Originally Posted by Hellbound View Post
Twitterstorm.
Perhaps, as proposed by Frederik Pohl in "The Day After the Martians Came," nothing much happens. Except for a spate of "How many 'Oumuamuans does it take to screw in a new navigation unit" jokes.
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Old 17th December 2017, 12:25 PM   #57
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I would have thought that the seeming absence of any propulsion system would have counted against this 'pointy thing' being some kind of craft. Not to mention its irregular shape, rocky nature and so on. But hey, it's pointy!
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Old 18th December 2017, 01:57 AM   #58
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Originally Posted by GlennB View Post
I would have thought that the seeming absence of any propulsion system would have counted against this 'pointy thing' being some kind of craft. Not to mention its irregular shape, rocky nature and so on. But hey, it's pointy!
I think the idea that it's some sort of alien spacecraft is pretty silly, but you seem to be overestimating what we know about it.

"absence of any propulsion system" for instance: we only know that it hasn't undergone any acceleration (other than due to gravity) since we've been observing it. "irregular shape": I think we only have a very vague knowledge of it's shape based on the varying intensity of light as it reflected toward the earth due to it's spin (which again is inferred from that varying intensity). If it were spherical the intensity wouldn't very due to the spin, but because it's longer than it is wide when we see the whole length of it more light is reflected toward us than when we only see it's width. "rocky nature" is again surmised, as I understand it, because it's not any icy body (concluded due to the lack of a cometary tail) and perhaps because of the reddish hue, that doesn't rule out some sort of metal, for instance, but "rocky nature" is the best guess based on what we know about asteroids.

At least, the above is my understanding. Really all we can see is a point of reddish light of varying intensity following a particular trajectory through the sky.
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Old 18th December 2017, 10:21 AM   #59
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Originally Posted by Roboramma View Post
If it were spherical the intensity wouldn't very due to the spin, but because it's longer than it is wide when we see the whole length of it more light is reflected toward us than when we only see it's width.
IIR, Pluto's moon, Charon, being fairly spherical, does exhibit just such a variation in albedo as it rotates.
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Old 18th December 2017, 11:23 AM   #60
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Originally Posted by Roboramma View Post
At least, the above is my understanding. Really all we can see is a point of reddish light of varying intensity following a particular trajectory through the sky.
Wait, what, a blinking red light?!?!?!

OK, so there are signs of tech and apparently the blinking red light on fake security cameras is just stolen advanced alien tech.
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Old 18th December 2017, 11:30 AM   #61
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Originally Posted by jimbob View Post
According to the interview on Inside Science on BBC radio 4,, there should be one within the inner solar system at the moment
about 7:30 in.
BBC Inside Science - Interstellar visitor, Svante Paabo, Synthetic biology, Plight of the Axolotl - @bbcradio4 http://www.bbc.co.uk/programmes/b09fj9n8

well worth listening to if you have access.

Thank you for posting that - I for one will be doing a listen again. Between 5:0 and 5:30 p.m. Radio 4 today, there was a Michelle Bannister, from Queen's University, Belfast, being interviewed on the subject.
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Old 18th December 2017, 11:50 AM   #62
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It's available at http://www.bbc.co.uk/programmes/b09jbs2k#play

Time: 20:30

It's just 5 minutes.
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Old 18th December 2017, 12:17 PM   #63
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Originally Posted by Captain_Swoop View Post
So no naked Mathilda May Space Vampire?
My initial response was disappointment that they didn't call it 'Rama', but I like the way you think.

I was particularly amused by the poster on Quora who claimed that he had spotted hieroglyphics on it's surface (that no one else had noticed) only to have it pointed out, at great length, that he was looking at low res scans of an artists impression!
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Old 18th December 2017, 03:19 PM   #64
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Originally Posted by P.J. Denyer View Post
I was particularly amused by the poster on Quora who claimed that he had spotted hieroglyphics on it's surface . . . . .
There are whole web sites based on "data" no more substantial than that.
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