In A Nutshell A massive star in the Andromeda Galaxy faded by more than 10,000 times over a decade and vanished from view, likely collapsing into a black hole without exploding as a supernova ...
In 2014, a NASA telescope observed that the infrared light emitted by a massive star in the Andromeda galaxy gradually grew brighter. The star glowed more intensely with infrared light for around ...
A massive star 2.5 million light-years away simply vanished — and astronomers now know why. Instead of exploding in a supernova, it quietly collapsed into a black hole, shedding its outer layers in a ...
For nearly a century, astronomers have known that the universe is expanding. Most galaxies are carried outward with the flow ...
A sheet of dark matter lying beyond the boundary of the Local Group is responsible for this.