Ultimate space simulation software

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by Watsisname
24 Nov 2019 15:14
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 222488

Science and Astronomy Questions

32107 I know it's just shifting the problem but it's quite possible that overall the amount of matter and antimatter universes is similar or even nearly equal and we just happen to live in a matter universe. The problem is that pair production must produce a lot of both matter and antimatter in thi...
by Watsisname
24 Nov 2019 07:45
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 222488

Science and Astronomy Questions

32098 But what I believe to have been understood is that Hawking radiation has not been proven yet, no one really knows what it is and that it's just a mathematical construct to preserve the entropy! Energy is also just a mathematical construct so that we can write formulas and describe physical pr...
by Watsisname
24 Nov 2019 05:54
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 222488

Science and Astronomy Questions

32089 Assuming that the Big Bang produced exactly equal amounts of matter and anti-matter, could the creation of anti-matter black holes be what shifted the balance and prevented everything from just annihilate into pure energy? Interesting idea.  Unfortunately I don't think this would solve the pr...
by Watsisname
24 Nov 2019 04:05
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 222488

Science and Astronomy Questions

32092 Then I probably always misunderstood the Hawking radiation.   I have always thought that this is caused by virtual particles that emerge outside the black hole. Join the club!  There are a lot of confusing things about black holes, but the mechanism behind Hawking radiation might be one of th...
by Watsisname
22 Nov 2019 23:49
Forum: Off-topic Discussions
Topic: Topic for Music Lovers
Replies: 136
Views: 46988

Topic for Music Lovers

More Wolf & Raven.  Perfect night driving vibes.

by Watsisname
22 Nov 2019 22:53
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 222488

Science and Astronomy Questions

32081 I do not know if that has been asked before, but could one distinguish a black hole made of antimatter from a black hole made of matter? Nope!  Not in any way whatsoever. :) The easiest but least satisfying way to reach this conclusion is by the No Hair Theorem, which says a black hole's only...
by Watsisname
22 Nov 2019 17:30
Forum: Off-topic Discussions
Topic: Sci-Fi (and other genre) Movies & TV Series
Replies: 49
Views: 11141

Sci-Fi (and other genre) Movies & TV Series

A-L-E-X wrote:
Qr Bbpost apparently he travels so fast he can see all pasts, presents and futures simultaneously.  He got his powers from an accident involving dark matter.

Oh no, did the dark matter accidentally interact with him?  It's not supposed to do that.
by Watsisname
22 Nov 2019 17:11
Forum: Science and Astronomy Discussions
Topic: Cosmology Discussion Thread
Replies: 116
Views: 11850

Cosmology Discussion Thread

32075 Wat, does the Baum-Frampton model add extra assumptions (like phantom energy?) It states w can be close to -1 but must be less than it. Indeed!  The first extra assumption is the phantom energy (that w must be less than -1.)  This is necessary because the model requires conditions approaching...
by Watsisname
22 Nov 2019 16:24
Forum: Off-topic Discussions
Topic: Supernova?
Replies: 27
Views: 3034

Supernova?

32058 Isn't there a way to emulate black hole effects too, by creating artificial black holes in a lab? Absolutely. :)  Analogues of black holes (in particular, demonstrating effects analogous to event horizons) can be made with fluids.  Set up a fluid flow where within some region the flow speed i...
by Watsisname
22 Nov 2019 15:47
Forum: Off-topic Discussions
Topic: Sci-Fi (and other genre) Movies & TV Series
Replies: 49
Views: 11141

Sci-Fi (and other genre) Movies & TV Series

I too would put Superman in fantasy instead of sci-fi.  Sci-fi can have a big range in terms of hardness, but the key difference from fantasy is how it explains how things work. Superman flies because -- I don't know how Superman flies.  He just does.  It is a convenient and ill-defined magic. It is...
by Watsisname
22 Nov 2019 14:58
Forum: Science and Astronomy Discussions
Topic: Cosmology Discussion Thread
Replies: 116
Views: 11850

Cosmology Discussion Thread

32053 Planck evidence for a closed Universe and a possible crisis for cosmology My take is that the most likely scenario is that the Planck 2018 power spectrum data do not actually indicate a positively curved universe, because if that is the case then discrepancies between other observations becom...
by Watsisname
21 Nov 2019 18:34
Forum: Off-topic Discussions
Topic: Supernova?
Replies: 27
Views: 3034

Supernova?

They're emulating a few of the effects of supernova explosions, specifically in how an expanding shockwave interacts with a thin medium around it.  Some of the images they captured look remarkably similar to real supernova remnants we see in space.  You can also get this effect by, say, detonating a...
by Watsisname
20 Nov 2019 22:13
Forum: Off-topic Discussions
Topic: Sci-Fi (and other genre) Movies & TV Series
Replies: 49
Views: 11141

Sci-Fi (and other genre) Movies & TV Series

Did I just see a guy yelling "screw you" while firing a machine gun at Jupiter?



I think I need to see this movie.
by Watsisname
20 Nov 2019 17:17
Forum: Off-topic Discussions
Topic: Sci-Fi (and other genre) Movies & TV Series
Replies: 49
Views: 11141

Sci-Fi (and other genre) Movies & TV Series

More nonsense than Armageddon, The Core, or even 2012?  Now I am intrigued...