Recent comments in /f/space

Tainticle t1_j8y5ryy wrote

I hate to be 'that guy', but:

Dark matter and dark energy are completely different, and from my layman's understanding - having opposite effects.

Dark matter (DM) is used to explain excess gravity observed in the universe - an attractive force.

Dark Energy is used to explain the observed accelerating expansion of the universe - a 'repulsive' force (not technically true, but observationally convenient phrasing).

Black holes are postulated to be possibly connected to the dark energy thing.

Upvoted for Ace Ventura reference.

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Vorticity t1_j8y4s2f wrote

I'd argue that, if you are able to overcome gravity via buoyancy and/or aerodynamic lift, you are not yet in space. If you need to use orbital velocity to stay up, then you're in space. That probably still leaves some room for argument, but it would be a pretty narrow range of altitudes in which to argue.

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Felaguin t1_j8y41wj wrote

Stupid article title and even the premise seems like bandwagoning to get clicks. While there is no universally-accepted legal definition of where space begins, the spy balloon is nowhere near any of the proposed boundaries.

There is no dispute about being able control our national airspace at 60,000 feet.

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