Posts by Sirius_Alpha

by Sirius_Alpha
01.02.2020, 03:45
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 51
Views: 56316

Re: Extrasolar Planets (updated catalogue)

TESS Sector 19 planets are out! Including a possible planet candidate transiting the white dwarf LP 141-14. Also, TESS has its first confirmed ~Earth-sized habitable planet candidate at TOI-700. One of the ExoFOP candidate dumps a few months ago included TOI-1338, a system that we already knew was a...
by Sirius_Alpha
26.01.2020, 21:49
Forum: Celestia Users
Topic: Another Celestia Discord
Replies: 30
Views: 568

Re: Another Celestia Discord

Hi, Redacted here. The point about the discord's owner having sailed off the edge of the earth and being effectively unreachable is a very strong argument. As for the user nussun , she is a problematic individual who spent much of her interaction with the discord creating problems and making many ot...
by Sirius_Alpha
12.01.2020, 18:34
Forum: Add-on releases
Topic: Updated stars.dat including Gaia DR2 data (update 2020-02-15)
Replies: 29
Views: 736

Re: Updated stars.dat including Gaia DR2 data (update 2020-02-15)

This is absolutely astounding. The structure of the local Galaxy is very visible. You can see clusters very easily now from afar. The older poor-accuracy parallaxes and photometric distances were so bad that you really couldn't see clusters beyond the Pleaides. But now all kinds of detail and cluste...
by Sirius_Alpha
10.01.2020, 02:30
Forum: Physics and Astronomy
Topic: I may have figured out Dark Matter and a Unified Theory
Replies: 25
Views: 447

Re: I may have figured out Dark Matter and a Unified Theory

Write this up in a paper and submit it to peer-review.
by Sirius_Alpha
01.01.2020, 18:40
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 51
Views: 56316

Re: Extrasolar Planets (updated catalogue)

where are the sources for the binary star definitions? I noticed that systems like 11 Com have a full definition including all the parameters, but I can't find any reference to those orbital elements. Apologies if this was mentioned somewhere else and I haven't noticed it. As I stated in the post f...
by Sirius_Alpha
01.01.2020, 05:28
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 51
Views: 56316

Re: Extrasolar Planets (updated catalogue)

Happy New Years, everyone. I hope you have all had a good holiday season. TESS Sector 17 and 18 planets are out! In the last update, I implemented orbit orientations for numerous multi-stellar systems that allowed for the system to be rendered as multiple while preserving the observed position angle...
by Sirius_Alpha
21.12.2019, 17:48
Forum: Physics and Astronomy
Topic: Electric Universe Theory
Replies: 38
Views: 1849

Re: Electric Universe Theory

This will probably be my only post on this thread since I kinda gave up dealing with this sort of thing years ago. Rather than posting an argument from a website that looks like it has just slightly more credibility than Time-Cube , why not get something published? Or go through the actual literatur...
by Sirius_Alpha
17.12.2019, 22:53
Forum: Bugs
Topic: Special characters
Replies: 5
Views: 255

Special characters

Everyone is likely aware of Gǃkúnǁʼhòmdímà, a rather large TNO. We've been able to Latinize its name in Celestia using "G!kun||'homdima" or variants thereof. The recent announcement of new names for a batch of a hundred new extrasolar planets brings with it a similar set of challenges. For...
by Sirius_Alpha
14.12.2019, 18:36
Forum: Development
Topic: Proposed cool stars temperatures update
Replies: 8
Views: 266

Re: Proposed cool stars temperatures update

Oh yes, that's right. But what about metallicity Most stars do not have readily accessible metallicities (as far as I know), certainly not in a systematized way like the data products from Hipparcos or Gaia. If there is a useful [M/H]- T _{eff}-Spectral table out there somewhere, it isn't clear how...
by Sirius_Alpha
14.12.2019, 18:30
Forum: Add-on development
Topic: Neutron Star's surface has been mapped!
Replies: 4
Views: 145

Re: Neutron Star's surface has been mapped!

As a general rule pop-sci outlets will always skew the science in favor of sensationalism and clickbait. Always, and I cannot stress this enough, always go to the original source (paper, publication, etc) for a more complete, accurate understanding of what is being reported. I recommend setting your...
by Sirius_Alpha
04.12.2019, 01:29
Forum: Celestia Users
Topic: Amalthea
Replies: 16
Views: 2808

Re: Amalthea

Joey P. , the green and blue regions in the graph above only denote where the spectra of those asteroids tend to lie, not the actual colour of the asteroids. For all three asteroid spectral types, they are varying degrees of red (their brightness increases with wavelength). The higher the slope, th...
by Sirius_Alpha
01.12.2019, 03:37
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 51
Views: 56316

Re: Extrasolar Planets (updated catalogue)

TESS Sector 16 planets are out! There are also candidates from southern hemisphere sectors that I'm guessing are continuing to be found as the data continues to be analyzed. Long-period planets in sector overlaps are being found, such as TOI-1338 for example with a ~71 day period. This update also i...
by Sirius_Alpha
23.11.2019, 18:51
Forum: Textures
Topic: Updating exoplanet textures
Replies: 25
Views: 871

Re: Updating exoplanet textures

SevenSpheres wrote:It's "SevenSpheres", which is supposed to be a reference to the TRAPPIST-1 system. Not "Steven".
I'm terribly sorry about that.
by Sirius_Alpha
23.11.2019, 15:07
Forum: Textures
Topic: Updating exoplanet textures
Replies: 25
Views: 871

Re: Updating exoplanet textures

I really appreciate the kind words, StevenSpheres . Another possibility to expand out the range of textures are the possibility of transitional textures. Of course the insolation a planet receives, for the simple case of a non-inclined planet (which I assume we'll be assuming, lacking information to...
by Sirius_Alpha
23.11.2019, 14:24
Forum: Petit Bistro Entropy
Topic: This site doesn't have a GANGNAM STYLE post ...
Replies: 21
Views: 8270

Re: This site doesn't have a GANGNAM STYLE post ...

Sorry if I'm necromancing, but... Walk me through what happened here in your mind. You started to respond to a thread, knowing you were necro-posting, and you even state that you were sorry you were doing it. So what did you do? Did you .... you know... not contribute a post to a decade-old thread?...
by Sirius_Alpha
10.11.2019, 20:08
Forum: Announcements
Topic: Website is now hidden behind CloudFlare
Replies: 25
Views: 1655

Re: Website is now hidden behind CloudFlare

But either way, I guess we shared some sensitive info that some hackers desire by accident? In fact I still cant imagine, what China may hope to achieve by ddos attack, except temporary disabling a service... Reason? Never strictely obvious. It's worth remembering that the source of an internet att...
by Sirius_Alpha
07.11.2019, 23:24
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 51
Views: 56316

Re: Extrasolar Planets (updated catalogue)

So the Wikipedia article is incorrect then? Someone should fix it... And that is why I don't use Wikipedia as a source for this. Yeah the IAU giving names to ... let's face it, radial velocity curves... seemed premature. The IAU-named Pollux b is somewhat controversial as well (the literature has g...
by Sirius_Alpha
07.11.2019, 20:36
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 51
Views: 56316

Re: Extrasolar Planets (updated catalogue)

Why isn't Fomalhaut b included? It should at least be in Exoplanets_Unconfirmed.ssc. Great question! Basically, a third observation of the object showed that its orbit crossed the debris ring around Fomalhaut A. This gives you a dynamical constraint on the mass of the planet to being less than ~3 E...
by Sirius_Alpha
01.11.2019, 21:54
Forum: Add-on releases
Topic: Extrasolar Planets (updated catalogue)
Replies: 51
Views: 56316

Re: Extrasolar Planets (updated catalogue)

TESS Sector 15 planets are out! I have implemented a better texturing system for sub-Jovian planets. Before, planets with radii 30,000 km > R_p > 10,000 km were given the venuslike.jpg texture, which has always been used to represent Neptune-like planets. Now the programme I use to write the .ssc fi...

Go to advanced search