Ultimate space simulation software

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by Watsisname
18 Jan 2019 06:22
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

A different spin on the question:   What is the most time dilation we could get by accelerating at 1g?   If we find a 10 billion solar mass black hole (about the most massive that we know of), then hovering at 12.66 horizon radii would yield about 9.8m/s 2  of gravitational acceleration, wi...
by Watsisname
18 Jan 2019 05:38
Forum: Off-topic Discussions
Topic: Unusual weather
Replies: 276
Views: 50982

Unusual weather

26214 My seismometer, however, has drowned in noise from a million waves crashing into the coast a 1000 km away. Wow!  This also really puts into perspective the challenges for the LIGO gravitational wave detector here in Washington.  If I recall right, they simply don't bother observing whenever t...
by Watsisname
18 Jan 2019 05:34
Forum: Off-topic Discussions
Topic: Show your desktop!
Replies: 53
Views: 21263

Show your desktop!

Nyarlasothoth , that's very nice.  I'm not sure if it's the same program, but the setup reminds me a lot of Rainmeter, which I used way back in the day and loved it: https://images-wixmp-ed30a86b8c4ca887773594c2.wixmp.com/intermediary/f/7a52cf34-11d1-4fa6-a2f9-e0c6b0edf6f8/d2qdqyx-2e8012b4-0d54-430...
by Watsisname
18 Jan 2019 05:12
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

26398 Wat- how fast would we have to accelerate to complete this 6 month "trip" in let's say one hour?  95% of the speed of light? *chuckles*   6 months in 1 hour is a time dilation factor of 4380.  To achieve this by special relativity, we must travel at a speed of 0.9999999739c, or 7.81...
by Watsisname
18 Jan 2019 04:22
Forum: Off-topic Discussions
Topic: The Future of Humanity & Intelligent life in the universe
Replies: 330
Views: 57769

The Future of Humanity & Intelligent life in the universe

Oops, I edited a little too late.   Anyway yes, I did see the more recent paper, but this is just a different method of calculation with more assumptions (we don't know the usual albedos or reflective properties of interstellar comets) which also does not distinguish between a pancake or cigar shape...
by Watsisname
18 Jan 2019 04:08
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

26392 Wat, I was thinking of a closed timelike curve (CTC) which I take it would be option 2.  Since there is no known physics for going faster than light is there a way to do it without going faster than light?  I've seen some research papers on it, but can't access them right now. Only by assumin...
by Watsisname
18 Jan 2019 02:16
Forum: Off-topic Discussions
Topic: The Future of Humanity & Intelligent life in the universe
Replies: 330
Views: 57769

The Future of Humanity & Intelligent life in the universe

26388 A good video Wats, but a little outdated. What is rendering it out of date? From what I can tell, the new information is a calculation for the shape (either cigar or a pancake) based on its light curve.  But this relies on a number of assumptions about its reflective properties, much like how...
by Watsisname
17 Jan 2019 05:09
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

A-L-E-X , the problem with saying anything about what time travel into the past would do is that depends on how you assume time travel into the past would work.  In this case, "what is your choice of path?" If you could travel faster than the speed of light, then certain observers will sa...
by Watsisname
17 Jan 2019 00:38
Forum: Off-topic Discussions
Topic: The Future of Humanity & Intelligent life in the universe
Replies: 330
Views: 57769

The Future of Humanity & Intelligent life in the universe

PBS Space-Time had a good run-down on this idea of 'Oumuamua being an alien solar sail (and why it probably isn't.)

by Watsisname
16 Jan 2019 04:52
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

26326 I looked down there (I wonder if we can calculate how long ago they were emitted from my feet?) About 6 nanoseconds.  Or, the same time ago as if you were not inside a black hole. :) 26326 Does the equivalency principle also apply to why if were to invent a time machine that we'd be in the sa...
by Watsisname
14 Jan 2019 23:26
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

26287  If I were in free fall inside the black hole does that mean I could actually be moving faster than the photons? No.  You will never outpace a photon moving in the same direction as you.  And everyone always measures the same speed of light, even if they are falling inside of a black hole. :)...
by Watsisname
14 Jan 2019 01:28
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

26283 Whats the nitty gritty of what would have happend if Tsar Bomba had made a 7 teraton explosion? Assuming it was detonated in the same place? Neglecting the radiation (which I'm not sure how to handle the details of, aside from the fallout probably being a big problem wherever the wind takes i...
by Watsisname
13 Jan 2019 19:25
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

26273 But if one assumes that the explosion was approximately spherical, also chunks would have to be found in the center under the explosion. This would be reasonable if the object came in exactly vertically, but a vertical entry is pretty unlikely.  In general, meteorite strewn fields are ellipse...
by Watsisname
13 Jan 2019 04:14
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

26255 I agree with Mid that if it had been a micro black hole, there should have been an exit point also (but if the exit point was an ocean who knows what the effect may have been- a megatsunami?) I've never really understood the microscopic black hole proposal for the Tunguska event.  Not only wh...
by Watsisname
12 Jan 2019 15:58
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Questions
Replies: 1351
Views: 135044

Science and Astronomy Questions

26246 Can the Tunguska event not simply be explained by a comet? A comet consists mainly of ice and may have been completely vaporized during the explosion. Yes, but a rocky asteroid could also explain the explosion, and for being spread over such a large area in that kind of terrain, fragments cou...