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Could Solar Radiation Pressure Explain Oumuamua’s Peculiar Acceleration?

90 points| madeuptempacct | 7 years ago |arxiv.org

36 comments

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[+] mindfulplay|7 years ago|reply
Before we jump to artificial/alien origins, let's at least consider the basic science before jumping to fantastical conclusions....
[+] yantrams|7 years ago|reply
I always found it quite interesting to see the parallels between arguments for God and aliens -- X can't be explained by science so I'm going to jump to the conclusion I want to believe. I thought I was immune to this kind of reasoning but even I fell for it with Oumuamua.

The initial paper and comments by some experts convinced me that there is a strong chance that this is a probe. It seemed plausible based on my limited understanding of Physics. (Moment of Inertia, Stresses etc.)

But then a paper[1] was released claiming this to be a comet. I so wanted my original belief to be true(because it was more exciting!) I considered the possibility that their [2]model wasn't accurate. I was even willing to entertain the idea of cover-up just because it didn't align with what I wanted to be true!

[1] https://www.space.com/41015-interstellar-visitor-oumuamua-co...

[2]A recent study claims that it was indeed the case and the probe is more likely to not be a comet. https://www.quantamagazine.org/interstellar-comet-oumuamua-m...

Edit: Formatting

[+] vertline3|7 years ago|reply
Extraordinary claims require extraordinary evidence - Carl Sagan
[+] Keyframe|7 years ago|reply
I'm sure "they" have used science to accelerate their ship/engine. I love when things like this happen and show just how much we still don't know, even about things we consider "basic".
[+] sunstone|7 years ago|reply
When you look at the trajectory that this object took through the solar system, coming within .14 AU of earth, you really have to wonder; what are the chances that it was a random flyby?
[+] InclinedPlane|7 years ago|reply
You have to consider instead the probability of detecting such objects that don't come very close to Earth. And that probability is actually pretty low (currently), so the proximity tells us very little beyond some general estimate of how common such objects are.
[+] vertline3|7 years ago|reply
Well, I think there could be lots of rocks but they are hard to see.
[+] Afforess|7 years ago|reply
>what are the chances that it was a random flyby?

~99.9̅% chance of being random. Absent any sort of evidence, it was a rare, meaningless event. The law of large numbers, however, suggests that rare events occur more frequently than you'd expect. E.g 1 in 1000 year floods could occur 3 times in a decade, since each event is statistically independent from others.

[+] jwfxpr|7 years ago|reply
The HN title needs to be corrected. The correct name is ʻOumuamua, including the first punctuation character (an ʻokina, representing a glottal stop).
[+] samspenc|7 years ago|reply
> We discuss the possible origins of such an object including the possibility that it might be a lightsail of artificial origin. Our general results apply to any light probes designed for interstellar travel.

Could someone clarify whether it means what I think it is saying - that an Arxiv paper is trying to prove that this is an object sent by an alien civilization to peek at our solar system?

[+] grondilu|7 years ago|reply
Yes, it means what you think it means, though "discussing the possibility" does not mean "trying to prove".

Weirder Arxiv papers exist, it's not that odd.

[+] tree_of_item|7 years ago|reply
No, you read it wrong. They are not trying to prove anything, they are discussing the possible origins of the object.
[+] naikrovek|7 years ago|reply
Anyone can publish to Arxiv; one doesn't need to be credible to publish there. I am not saying these authors are untrustworthy, by the way, or that the object in question is or is not of alien & artificial origin; I am saying that anyone can publish a paper to Arxiv.
[+] selimthegrim|7 years ago|reply
David Brin is sticking to the solar radiation causing outgassing after a delay hypothesis. Go figure - it was his thesis
[+] vijaybritto|7 years ago|reply
I hope it's an alien probe sent by a mother ship. They should come and just destroy us before we slowly destroy ourselves!
[+] dgzl|7 years ago|reply
Speak for yourself, there's still plenty of things I want to do on this planet.
[+] toasterlovin|7 years ago|reply
> They should come and just destroy us before we slowly destroy ourselves!

Your misanthropy doesn’t even make sense. We should be destroyed because we are going to destroy ourselves? As in, we’re going to fall off a cliff, so why not just push us off pre-emptively?