Ultimate space simulation software

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by Watsisname
25 Sep 2018 00:51
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1101
Views: 103422

Science and Astronomy Questions

As an aside, with all this talk of "supercritical fluid" which might be unfamiliar to some, I wanted to show what it looks like, in the case of carbon dioxide.  The essence of a supercritical fluid is that the boundary between liquid and gas phase disappears.  If a liquid becomes supercrit...
by Watsisname
25 Sep 2018 00:35
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1101
Views: 103422

Science and Astronomy Questions

23011 I think it would be more like a red/white substance since the mercury might glow red-hot or even white-hot when it gets that hot. Fascinating that mercury's conductivity is dramatically increased as it heats up to supercritical, makes you wonder. Yeah, I discount the thermal glow, which would...
by Watsisname
23 Sep 2018 10:17
Forum: Gameplay Discussions
Topic: Astrobiology in Space Engine
Replies: 8
Views: 114

Astrobiology in Space Engine

Oh goodness, I completely mixed up the conversation (I think because I had jumped across 2 pages and mixed up who said what).  Plus being tired didn't help.  My apologies. :)
by Watsisname
23 Sep 2018 07:26
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1101
Views: 103422

Science and Astronomy Questions

22986 Has anyone ever made super-critical Mercury?   What does it/would it look like? This is a really cool question.  Yes, quite a few researchers have made it and measured its properties!  Its critical point is at 1751 Kelvin and 167MPa (or 1650 atm).  At temperatures and pressures higher than th...
by Watsisname
23 Sep 2018 05:59
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 267
Views: 45746

Show off your work

I have split the discussion that arose from here to the Astrobiology in Space Engine thread.  It may be continued there. :)
by Watsisname
23 Sep 2018 05:51
Forum: Gameplay Discussions
Topic: Astrobiology in Space Engine
Replies: 8
Views: 114

Show off your work

22988 The real issue though is that SE is an astronomy software, not a biology one Then perhaps we should remove all "planets with life" from Space Engine? I think  considerations of astrobiology are important in a universe simulator.  We might know very little about how common life is, b...
by Watsisname
20 Sep 2018 16:16
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 479
Views: 47907

Science and Astronomy News

22912 But planet-mass black holes are impossible to exist, right? I was joking about what happens to Vulcan in one of the Star Trek movies. ;)   I n reality planet-mass black holes are absolutely possible, but probably not found in planet-like orbits.  Let's get the first (very artificial and proba...
by Watsisname
20 Sep 2018 03:18
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 479
Views: 47907

Science and Astronomy News

I was about to say it's nice to know Vulcan has not been turned into a black hole yet, but then realized it was detected by the radial velocity method, which cannot distinguish a planet-mass black hole from a regular planet. :P
by Watsisname
19 Sep 2018 22:22
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 267
Views: 45746

Show off your work

Perfect reflection. :)

Image
by Watsisname
17 Sep 2018 20:55
Forum: General Discussions
Topic: Physical simulation of the space engine
Replies: 8
Views: 342

Physical simulation of the space engine

22862 Can you tell me what physical simulations have been implemented in the space engine? I think Space Engine involves more emulation than simulation.  For example it never simulates the geological processes behind terrain building or erosion.  It instead emulates surface features by procedural a...
by Watsisname
16 Sep 2018 02:02
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1101
Views: 103422

Science and Astronomy Questions

Since the light reflected by Mars comes from the Sun, so instead of seeing Mars 5 minutes in the past, we would not be seeing it in 18 minutes? ... OK. I had supposed that because if the sun went out and then re-started it would take 18 minutes for the light to reach Mars and then reflect on Earth....
by Watsisname
15 Sep 2018 03:15
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1101
Views: 103422

Science and Astronomy Questions

Changing the plane of the orbits to get a Hubble-ISS rendezvous is the most infeasible part.  Changing orbital altitude isn't too bad, but plane change maneuvers in low orbit are...  insanely  delta-v expensive.  You can get a sense of this in KSP or Orbiter.  And then factoring in what midtskogen n...
by Watsisname
11 Sep 2018 04:04
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 267
Views: 45746

Show off your work

Yeah, I was thinking of alliteration (spirit of summer stands), and also used a lot of s's and soft c's, and generally getting sounds to repeat or flow together, but I didn't always hit it on the first syllable.  (Like the s in rising.)  Surging is a good one. :)
by Watsisname
11 Sep 2018 03:38
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 267
Views: 45746

Show off your work

Meteorological autumn has arrived, and as I lay on the edge of an island and watched the weather roll in, I wrote a poem.  (Yes, I love poetry).   I didn't worry too much about fitting formal poetic devices, but I think it worked out nice. I lie on winter's precipice Surrounded by never ending w...
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