Ultimate space simulation software

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by Watsisname
24 Apr 2019 23:45
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 360
Views: 64035

Show off your work

@Midtskogen: Perfect skies!   I haven't been up in the mountains for a while, but in the meantime I continue beach combing.  Today I found a great example of  Carnelian . https://i.imgur.com/dMGPylk.jpg Holding it up to the light to check its translucence, it also unexpectedly became a great example...
by Watsisname
24 Apr 2019 21:20
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Videos
Replies: 413
Views: 53522

Science and Astronomy Videos

And another excellent explanation by PBS Space Time

by Watsisname
23 Apr 2019 11:19
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 619
Views: 73946

Science and Astronomy News

I recall seeing some amazing  screenshots posted over the years of lighting in multiple-star systems with multiple colors.  I don't have any offhand, but they shouldn't be hard to find, or to discover yourself in SE.  Just like Mr. Abner said, good ways to see it are with eclipse shadows and ring sh...
by Watsisname
20 Apr 2019 16:19
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy News
Replies: 619
Views: 73946

Science and Astronomy News

A-L-E-X wrote:
Qr Bbpost I've always wondered what shadows would look like in multiple star systems- especially with different colored stars!

Space Engine is a good way to experience it. :)
by Watsisname
20 Apr 2019 16:06
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 360
Views: 64035

Show off your work

Perhaps not, but I will snap the universe back into balance.

Time, space, and mind.  3 to go...
by Watsisname
20 Apr 2019 04:19
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 360
Views: 64035

Show off your work

What's this? https://i.imgur.com/Qk34v9x.jpg A softly glowing gem was lying on the beach. https://i.imgur.com/LAcPFPO.jpg A rarity, but easily found, if one knows to look.  They are agates, and come in all sorts of sizes, colors, and patterns.  Some are banded, others are transparent and shine like...
by Watsisname
15 Apr 2019 02:43
Forum: Science and Astronomy Discussions
Topic: Science and Astronomy Videos
Replies: 413
Views: 53522

Science and Astronomy Videos

Stellarator , very cool episode.  Fortunately, while it makes for a great cosmic horror story, I think we can safely rule out a strange apocalypse by a simple observation:  most of the heavy elements on Earth above atomic number 44 were forged in the collisions of neutron stars.  That includes most...
by Watsisname
14 Apr 2019 05:11
Forum: Off-topic Discussions
Topic: Show off your work
Replies: 360
Views: 64035

Show off your work

Unedited photo of a fluorite crystal fluorescing under a 405nm laser.  Reminds a bit of the Tesseract in the Marvel movies.

Image
by Watsisname
13 Apr 2019 22:53
Forum: Science and Astronomy Discussions
Topic: The first black hole photo
Replies: 28
Views: 1010

The first black hole photo

On that same note, I made a quick demonstration of how the EHT imaging of the black hole works even despite such a sparse array of telescopes to fill in the Earth-sized "virtual telescope".   Here I used the software FTL-SE  to take the Fast Fourier Transform (FFT) of the Manedlbr...
by Watsisname
12 Apr 2019 21:01
Forum: Science and Astronomy Discussions
Topic: The first black hole photo
Replies: 28
Views: 1010

The first black hole photo

28238 Question- why did this have to be kept secret for years (even from family members)?  On news reports, the MIT scientist who formulated the algorithm said she couldn't tell anyone, not even family members. I think this is excellently explained in the press conference, in the segment from 19:43...
by Watsisname
12 Apr 2019 02:47
Forum: Science and Astronomy Discussions
Topic: The first black hole photo
Replies: 28
Views: 1010

The first black hole photo

Salvo yeah, M87's disk is almost face-on to us.  There is a little bit of a tilt and so the bottom side, rotating slightly towards us, appears brighter than the top due to Doppler boosting. Figure 1 from the  5th paper released with the M87 results  gives a nice comparison of what we see, a full-re...
by Watsisname
11 Apr 2019 02:12
Forum: Science and Astronomy Discussions
Topic: The first black hole photo
Replies: 28
Views: 1010

The first black hole photo

28213 If you cross the event horizon at an angle, would that change? Yes.  It would become shorter. :)   Here I've rendered an animation to show this surprising result.  We drop in from 5 times the horizon radius of the black hole SgrA*, at first starting perfectly from rest, but then with more and...
by Watsisname
10 Apr 2019 22:30
Forum: Science and Astronomy Discussions
Topic: The first black hole photo
Replies: 28
Views: 1010

The first black hole photo

Just to avoid any confusion, that image of SgrA* shown by Veritasium is based on simulations, not real data.  EHT has not released an image of SgrA* yet, though that is in the pipeline. :) Randall of XKCD has made a nice size comparison to give some sense for how big M87's black hole really is.  It'...
by Watsisname
10 Apr 2019 06:54
Forum: Science and Astronomy Discussions
Topic: The first black hole photo
Replies: 28
Views: 1010

The first black hole photo will be released tomorrow

28197 First reaction: How boring, looks just like the predictions. Do we know already what there is to know? One immediate revelation from the image is that it has solved a discrepancy between different indirect methods of measuring supermassive black hole masses.  Now we can measure directly by th...
by Watsisname
10 Apr 2019 00:56
Forum: Science and Astronomy Discussions
Topic: The first black hole photo
Replies: 28
Views: 1010

The first black hole photo will be released tomorrow

A number of us will be on the Space Engine Discord server watching and discussing the press conference as it happens.  The conferences start at 13:00 UTC and there will be several of them held simultaneously with live streams available.  Check the media advisory for details.

5 hours to go! :)