Ultimate space simulation software

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by Watsisname
24 Dec 2016 03:55
Forum: Space Journeys
Topic: Image Dump
Replies: 2658
Views: 389232

Image Dump

Julian wrote:
This year, let the entire Space Engine universe be your Christmas tree!

Awesome image!
by Watsisname
24 Dec 2016 01:45
Forum: General Discussions
Topic: Can anyone find a Habitable Rogue planet?
Replies: 32
Views: 12765

Can anyone find a Habitable Rogue planet?

Space Engine's tidal heating formula may not be perfectly realistic (it's a simple model for the dissipation of energy in tidal evolution, which itself is pretty accurate, but computing surface temperature based on the tidal heating depends on properties of the world and its atmosphere which are ver...
by Watsisname
23 Dec 2016 21:28
Forum: General Discussions
Topic: Can anyone find a Habitable Rogue planet?
Replies: 32
Views: 12765

Can anyone find a Habitable Rogue planet?

You all forget tidal heating. :)  You can certainly find habitable worlds with no sun.

Image
by Watsisname
23 Dec 2016 17:17
Forum: Off-topic Discussions
Topic: Totally off-topic thread
Replies: 1004
Views: 179130

Totally off-topic thread

Marvelous photo.  I love those kinds of projections. :)
by Watsisname
23 Dec 2016 01:36
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 235808

Science and Astronomy Questions

Watsisname , interesting. So in order for a photon to escape from inside the event horizon, it would have had to be omitted in a very narrow window of time, and even then, the red-shift alone would make it almost impossible to detect.  Precisely.  If emitted very close but just above the horizon, t...
by Watsisname
22 Dec 2016 19:18
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 235808

Science and Astronomy Questions

Would you all agree that if you were to look at the event horizon of a black hole, it would be absolutely black? It would be the blackest black that was ever black.   Your idea reminds of a more common question: "if material falling into the hole is frozen in time at the event horizon, then wo...
by Watsisname
22 Dec 2016 04:55
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Videos
Replies: 457
Views: 75686

Science and Astronomy Videos

Oh snap, he quoted me in the Q&A. :)
by Watsisname
20 Dec 2016 23:11
Forum: Off-topic Discussions
Topic: Totally off-topic thread
Replies: 1004
Views: 179130

Totally off-topic thread

The coolest number!
by Watsisname
19 Dec 2016 22:13
Forum: Development
Topic: Quotes about Universe for loading window
Replies: 101
Views: 32322

Quotes about Universe for loading window

"I have no doubt that in reality the future will be vastly more surprising than anything I can imagine. Now my own suspicion is that the Universe is not only queerer than we suppose, but queerer than we can suppose." J. B. S. Haldane "Since one of the most wondrous and noble question...
by Watsisname
18 Dec 2016 19:52
Forum: Off-topic Discussions
Topic: Dreams you've had
Replies: 102
Views: 42621

Dreams you've had

The strangest dream I've ever had was where I decided to go to sleep and I woke up.
by Watsisname
17 Dec 2016 16:23
Forum: Science and Astronomy Discussions
Topic: Astrophotography
Replies: 433
Views: 65591

Astrophotography

Spectacular shot of the ISS transit!
by Watsisname
17 Dec 2016 01:40
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 235808

Science and Astronomy Questions

Nope!  Methane and ethane are both odorless. :)  The smelly stuff in a fart is mostly hydrogen sulfide and other sulfur-containing compounds.
by Watsisname
16 Dec 2016 14:39
Forum: Science and Astronomy Discussions
Topic: Asteroids, meteors, and meteorites
Replies: 35
Views: 7975

Asteroids, meteors, and meteorites

That does seem odd, but the way their simulations work is to follow the transfers of energy during the impact -- both through atmosphere and water, so all that varying impact speed does is scale the total energy by the square of the speed.  (And as you intuited, it also plays into whether it reaches...
by Watsisname
15 Dec 2016 12:44
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 235808

Science and Astronomy Questions

And I also remembered, as light passes a rotating object it is sped up on the side that rotates in the same direction and when it passes a rotating object on the side opposite of the rotation light is slowed down. Not quite sure how this happens. The light still locally moves with a speed c through...
by Watsisname
14 Dec 2016 20:58
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1635
Views: 235808

Science and Astronomy Questions

The gravitation-producing mass-energy equivalence is also important in cosmology.  It is not only the density of matter which causes the universe's expansion rate to change with time, but also the density of energy (for example in the form of light, relativistic particles, or even a cosmological con...