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Astronomical news

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Pmt111500:
Thought "The Rest"-section of ASIF could use some science, astrometrical data has revealed a new companion galaxy to Milky Way, located on the far side, south of Vela constelllation. Very dim of course: https://www.sciencemag.org/news/2018/11/large-strangely-dim-galaxy-found-lurking-far-side-milky-way

Pmt111500:
Couldn't find astronomy-thread so might use this thread for extraterrestrial news  8) ::). Just thought some might find it fun to read of other scientics than those related to climate. Similar threads for genetics, archeology, inorganic chemistry, medicine could be made here. The threads for science that is little to none related to climate change, that is. The wolf-rayet thread can be deleted so it won't be a single post thread.

Supernova candidate re-interpreted as potential gamma-ray burster by Aussie astronomers. The cone of the burst is not expected to hit earth:  https://sydney.edu.au/news-opinion/news/2018/11/20/doomed-star-in-milky-way-threatens-rare-gamma-ray-burst.html

kassy:
We can either go with multiple threads or change the thread title to something more general and keep it in one thread.

I think Neven should pick because it is his site.  ;)

I do like your idea.

We found a new Tabbies-star like star:

stronomers Have Detected a New 'Alien Megastructure' Star, And It Might Give Us The Missing Answers

Between Earth and the galactic core, there's an old, faint star that appears to have something orbiting it, something that's confusing astronomers.

...

Astronomers first noticed VVV-WIT-07's odd periodic flickering during a 2012 survey of the inner Milky Way using the VISTA telescope in Chile. Now they're reporting their find, without being all that sure of what's causing it.

...

In 2012, VVV-WIT-07's amplitude was found to dim slowly for around 11 days, and then rapidly fade to next to nothing over the next 48 days.

The eclipse blocked a whopping 80 percent of the measured light, providing the astronomers with a real mystery. None of the usual explanations accounted for the eclipse.

...

The media attention might well come in handy, but Boyajian dismisses notions that alien ingenuity might be behind it.

"The new data shows that different colours of light are being blocked at different intensities," she said recently.

"Therefore, whatever is passing between us and the star is not opaque, as would be expected from a planet or alien megastructure."

That could mean it's a megastructure with tinted windows. Or maybe it's just time to let the idea go. Sorry.

and more on
https://www.sciencealert.com/a-new-alien-megastructure-has-been-found-and-it-might-soon-give-us-answers

BTW i like the last cited bit. I really dislike the idea of advanced alien societies building Dyson spheres.


Neven:

--- Quote from: Pmt111500 on November 17, 2018, 02:46:17 PM ---Thought "The Rest"-section of ASIF could use some science, astrometrical data has revealed a new companion galaxy to Milky Way, located on the far side, south of Vela constelllation. Very dim of course: https://www.sciencemag.org/news/2018/11/large-strangely-dim-galaxy-found-lurking-far-side-milky-way
--- End quote ---

Perfect, thanks!

icefisher:
Changing light densities may indicate light being reflected by rings of ice crystals (similar to Saturn but much larger) prior to passage of a large gas giant 2-3 times the size of Jupiter.  Another possibility is a binary system with one of them being a young dim star.  Taking gravity, tilt, rotational speed, mass ... etc into account.  Lots and lots of possibilities.

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