Recent comments in /f/space

GhostCallOut2 OP t1_jcuwtkk wrote

Reply to comment by Lirdon in What if The Universe Has Always Existed by GhostCallOut2

What if the universe is in a constant loop of creation and destruction? Let's say the big bang is correct, but if the universe expands and then comes back together, forming the ball of energy as the big bang states?

Thank you for that information, too. I hope to one day understand the universe in some sort of way. But what if there were millions of universes before ours? It's a constant loop of it being created. It wouldn't disprove anything we have since the Big Bang still happened, but it would change a lot about what we think about the universe.

This hypothesis would make much more since then the universe just always existing, basing it off of everything we know that is. I do still believe that the Big Bang isn't the answer, but I do believe it is a start of understanding it.

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AlbaneseGummies327 OP t1_jcud9xw wrote

Reply to Fallen Astronaut statue and a name plaque left on the surface of the Moon by the crew of Apollo 15 by AlbaneseGummies327

Fallen Astronaut is a 3.5-inch (8.9 cm) aluminum sculpture created by Belgian artist Paul Van Hoeydonck.

It is a stylized figure of an astronaut in a spacesuit, intended to commemorate the astronauts and cosmonauts who have died in the advancement of space exploration.

It was commissioned and placed on the Moon by the crew of Apollo 15 at Hadley Rille on August 2, 1971 UTC, next to a plaque listing 14 names of those who died up to that time. The statue lies on the ground among several footprints.

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axialintellectual t1_jcth8h9 wrote

Reply to comment by beef-o-lipso in Containing an incredible half-million stars, this 8-billion-year-old cosmic bauble is one of the largest and brightest globular clusters ever discovered. Credits: ESA/Hubble by Davicho77

It's still rare, but the orders of magnitude higher density, and the fact that globular clusters get quite old, means that there's a lot of opportunities. Here's a recent paper about the topic, if you want to read more.

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axialintellectual t1_jctcpbv wrote

Reply to comment by beef-o-lipso in Containing an incredible half-million stars, this 8-billion-year-old cosmic bauble is one of the largest and brightest globular clusters ever discovered. Credits: ESA/Hubble by Davicho77

Good question! On the planet formation side: protoplanetary disks would be heavily irradiated by the other nearby stars, which tends to shorten the lifetime available to planet formation; they can also get disrupted by flyby-events. If a planetary system does form, those same flybys continue and can disrupt it over longer timescales. On the other hand, we don't - to the best of my knowledge - have very good constraints on planet occurrence rates in globular clusters, because they're far away and hard to observe, but I would say from a theoretical point of view these are quite well-understood mechanisms.

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