I was reading just yesterday that it's a lot dimmer than expected, indicating some internal mechanisms going through change and that it might have run low in hydrogen. When that thing goes supernova, we will know what a proper explosion looks like.

Dark matter investigations using gravitational lensing.
Observations of multiple images of 8 distant [10 billion light years] quasars caused by the intense gravitational fields of nearer [2 billion light years distant] intervening galaxies indicate that dark matter forms into relatively small clumps as well as galaxy- and galaxy cluster-enfolding clouds.
This supports the cold [i.e. slow moving] theory of dark matter.

www.jpl.nasa.gov/news/news.php?feature=7572&utm_source=iContact&utm_medium=email&utm_campaign=nasajpl&utm_content=daily-20200108-1

What dark matter is, is still totally unknown - despite $billions being spent on lab and supercollider experiments no hint has been found of dark matter particles. [Lots of other stuff has been discovered, though]. Everything we think we know about dark matter comes from galaxy scale astronomical observations which imply its existence. As quoted in that article "Particle physicists would not even talk about dark matter if the cosmologists didn't say it's there, based on observations of its effects."

Hmm. 
I may well be very wrong, but I've a feeling that we are totally missing something huge and fundamental about physics.

When that star goes supernova, you won't be needing a telescope.

... although all the known moons of Saturn orbit in pretty much the plane of the rings, so the rings would be seen as a thin line edge-on which would rather spoil the effect to an extent, so the Earth would have to be on an unusual (but perfectly possible) tilted orbit around Saturn to get that view.

Oh noooooooooo - the James Webb Space Telescope launch looks likely to be delayed yet again.

Over 10 years late already and way over budget, but still worth every cent - its capabilities will substantially exceed the wonderful Hubble Space Telescope and it will inevitably reshape and deepen our understanding of the universe.
Look directly at exoplanet atmospheres, peer back to the very beginning of time, and so much more that can barely be imagined - yep, no problem.

www.theverge.com/2020/1/28/21112504/nasa-james-webb-space-telescope-delay-gao-audit-march-2021

Extreme astronomy!

Two white dwarf stars [the remnants of sun-like stars that have violently shed their outer hydrogen/helium layers to leave behind a compact stellar core] have been found that orbit their common centre of gravity in less than 7 minutes. Their orbits could fit comfortably inside the planet Saturn.

The physics is so extreme that the rapidly orbiting stars emit enough gravitational wave energy to measurably affect their orbits over a period of months - a really precise test for Einstein's general theory of relativity. Yup, Einstein is spot on yet again! That guy knew his stuff.

Due to the emission of gravitational energy these 2 ultra-dense objects will slowly spiral closer together for the next 130,000 years - so don't bother waiting for their cataclysmic get together.

astrobites.org/2020/01/31/it-takes-two-to-tango-eclipsing-white-dwarfs-push-general-relativity-to-its-limit/

For fans of gravitational lensing ....

"Invisible" double star 2,500 light years away detected and investigated by gravitational lensing.

"We don't see this binary system at all, but from only seeing the effects that it created by acting as a lens on a background star, we were able to tell everything about it," said astronomer Przemek Mróz, formerly of the University of Warsaw and now at the California Institute of Technology.

"We could determine the rotational period of the system, the masses of its components, their separation, the shape of their orbits - basically everything - without seeing the light of the binary components."

Which is more than a bit mind blowing!

www.sciencealert.com/astronomers-found-a-pair-of-invisible-stars-they-could-lead-us-to-hidden-black-holes

Incredible that so much can be deduced from a smudgy picture.