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Comment: Re:Ground vs Space (Score 1) 74

by somegeekynick (#39461899) Attached to: Massive Construction Effort Begins For World's Largest Telescope
What you're referring to is interferometry. I came across a news in the last few months that someone somewhere making suggestions along similar lines. As has already been said, space-based observation is comparatively costlier both to build (and send it up) and difficult to maintain or upgrade compared to ground-based installations.

Comment: Re:What does that even mean? (Score 1) 506

by somegeekynick (#35077484) Attached to: Universe 250+ Times Bigger Than What Is Observable

That observation never quite sat with me though. It works for an ant - incapable of reason, but swap out the situation for a PERSON sitting on another circular surface (like, say, a planet), and we have figured out quite readily that our surface is unending but finite - it's obvious - go in another direction and you end up circling back.

The analogy has nothing to do with the intelligence of the creatures. I agree that ants on a balloon are no different than humans on Earth, so the appropriate analogy will involve imaginary two-dimensional creatures on the two-dimensional surface of the balloon (similar to three-dimensional humans roaming about in a universe with three spatial dimensions). You should consider the surface as it is and not as being embedded in a higher-dimension space, i.e. you should neither consider the volume occupied by the balloon nor the space surrounding it.

"If you are afraid of loneliness, don't marry." -- Chekhov

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