When a massive star runs out of fuel and approaches the end of its life, it explodes in a huge outpouring of energy called a supernova. These events can be so bright that they outshine entire galaxies, but they don’t last for long — just the blink of a…
Trying to measure the size of the universe is no easy task. We know that the universe is expanding, though the exact rate of this expansion is not yet fixed. So one method that astronomers use to tell how far away very distant objects are is called the…
The Hubble Space Telescope has spotted what’s been confirmed as the largest comet ever seen.
At around 80 miles across, the comet, named C/2014 UN271 (Bernardinelli-Bernstein), is larger than Rhode Island, according to NASA, which shared news of Hubble…