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Interstellar Visitor Found to Be Unlike a Comet or an Asteroid

quantamagazine.org

21–30 of 118 posts

Re: Interstellar Visitor Found to Be Unlike a Comet or an Asteroid

#21

Would gravitational pull account for the acceleration? Meaning if it were made (or part of it) of some very dense element like Iridium, there would be an unexpected attraction to our sun?

Gravity doesn't work that way, I'm afraid, as Galileo demonstrated.

Re: Interstellar Visitor Found to Be Unlike a Comet or an Asteroid

#23
post #3

I'm still convinced this is an alien probe. I mean look at that trajectory. 0.163 AU from Earth - what are the odds? The spinning is irrelevant surely - I mean, it's all relative, so as far as ’Oumuamua is concerned, we're spinning. Maybe it was spinning that way to stay aligned with a distant companion for communication.

The odds we expect depend on our detection ability. Maybe there are thousands of these objects but we saw this one only because it passed so close to Earth.

There is fairly strong consensus in the astronomy community that possibly hundreds of Sednoid class objects exist, and those are in relatively normal orbits compared to things which are beyond solar escape velocity. But so far we've only found 3 or 4 Sednoids.

https://en.m.wikipedia.org/wiki/Sednoid

Re: Interstellar Visitor Found to Be Unlike a Comet or an Asteroid

#24
post #6

Based on the comments in this thread, I'm sure this will soon be an episode of 'Ancient Aliens' on the "History" Channel. If it isn't already.

How Oumuamua inspired the Egpytians to use logs and slave labor to build stone pyramids, like any advanced ancient alien would.

Re: Interstellar Visitor Found to Be Unlike a Comet or an Asteroid

#25
post #3

I'm still convinced this is an alien probe. I mean look at that trajectory. 0.163 AU from Earth - what are the odds? The spinning is irrelevant surely - I mean, it's all relative, so as far as ’Oumuamua is concerned, we're spinning. Maybe it was spinning that way to stay aligned with a distant companion for communication.

I prefer a complementary theory -- that it's a spent stage of a multi-stage spacecraft. If the primary stage were decelerating for a rendezvous with Earth, then any stage that made it to full acceleration would reach us first, probably getting close and then flinging back out of the solar system, just like this did.

Easy enough to test -- we'll eventually see another object following the same trajectory, give or take, but that's decelerating.

(Cue the dramatic music.)

Re: Interstellar Visitor Found to Be Unlike a Comet or an Asteroid

#26
post #3

I'm still convinced this is an alien probe. I mean look at that trajectory. 0.163 AU from Earth - what are the odds? The spinning is irrelevant surely - I mean, it's all relative, so as far as ’Oumuamua is concerned, we're spinning. Maybe it was spinning that way to stay aligned with a distant companion for communication.

I prefer a complementary theory -- that it's a spent stage of a multi-stage spacecraft. If the primary stage were decelerating for a rendezvous with Earth, then any stage that made it to full acceleration would reach us first, probably getting close and then flinging back out of the solar system, just like this did. Easy enough to test -- we'll eventually see another object following the same trajectory, give or take…

"And on far-off Earth, Dr. Carlisle Perera had as yet told no one how he had wakened from a restless sleep with the message from his subconscious still echoing in his brain: The Ramans do everything in threes."

Re: Interstellar Visitor Found to Be Unlike a Comet or an Asteroid

#28

Earlier quoted context omitted.

I prefer a complementary theory -- that it's a spent stage of a multi-stage spacecraft. If the primary stage were decelerating for a rendezvous with Earth, then any stage that made it to full acceleration would reach us first, probably getting close and then flinging back out of the solar system, just like this did. Easy enough to test -- we'll eventually see another object following the same trajectory, give or take…

"And on far-off Earth, Dr. Carlisle Perera had as yet told no one how he had wakened from a restless sleep with the message from his subconscious still echoing in his brain: The Ramans do everything in threes."

Great series of books! Every time I see a thread about this big rock I think of Rama.

Re: Interstellar Visitor Found to Be Unlike a Comet or an Asteroid

#29

It's too bad we're not ready to launch probes to visit and explore such transient objects at a moment's notice.

Let's say it takes us another 50 years to fund and prepare a mission, could we still catch up with it?

So far we've managed to accelerate three probes to solar escape velocity using a lucky constellation of planets for gravity assists. Catching up with an object that has a 50 year head start seems very unlikely to me unless you assume very advanced propulsion systems, e.g. nuclear pulse propulsion or something similar. Even then catching up would take a very long time, longer than anything we built survived in space so far. How do you power a probe that's supposed to travel for fifty years give or take?

Re: Interstellar Visitor Found to Be Unlike a Comet or an Asteroid

#30
post #3

I'm still convinced this is an alien probe. I mean look at that trajectory. 0.163 AU from Earth - what are the odds? The spinning is irrelevant surely - I mean, it's all relative, so as far as ’Oumuamua is concerned, we're spinning. Maybe it was spinning that way to stay aligned with a distant companion for communication.

Looking at the images on that site, the trajectory doing a "fly by" of a lot of the planets did look remarkedly like the sort of thing we've being doing for decades in our own solar system [1]- line up a bunch of planets and use gravity slingshots to do a close fly-by to get a closer look.

The thought makes me have goose-bumps. Did some alient race just take a close look at us? Was there a voyager-style plaque on it? I guess we'll never know now.

Occam tells us that in reality it is most likely just some space debris from some ancient rock-smashing incident, but the fact that this thing continues to defy classification allows us some space to imagine!

1 - https://duckduckgo.com/?q=voyager+gravity+slingshot+diagram&...

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