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Black Hole
In astronomy, a star's initial mass determines its ultimate outcome in life. Unless, that is, a stellar companion alters the deal.
Black holes are the most massive individual objects, spanning up to a light-day across. So how do they make jets that affect the cosmic web?
In the year 1181, a "guest star" was recorded in the constellation of Cassiopeia. Its modern supernova remnant is weirder than we imagined.
More than two years after JWST began science operations, our Universe now looks very different. Here are its biggest science contributions.
Watching for changes in the Red Planet’s orbit over time could be new way to detect passing dark matter.
Time is relative, not absolute, as gravity and motion both cause time to dilate. Your head and feet, therefore, don't age at the same rate.
With the discovery of Porphyrion, we've now seen black hole jets spanning 24 million light-years: the scale of the cosmic web.
Galactic activity doesn't just arrive when supermassive black holes feast on matter. Before, during, and after all create fascinating signs.
The "little red dots" were touted as being too massive, too early, for cosmology to explain. With new knowledge, everything adds up.
A recent paper in the journal Physical Review Letters claims to prove that a "kugelblitz" is not possible.
Even in the very early Universe, there were heavy, supermassive black holes at the centers of galaxies. How did they get so big so fast?
In July of 2022, the first science images from JWST were unveiled. Two years later, it's changed our view of the Universe.
On the largest of cosmic scales, the Universe is expanding. But it isn't all-or-nothing everywhere, as "collapse" is also part of the story.
There was a time where no starlight was visible throughout the entire cosmos. That time was short-lived: shorter than astronomers imagined.
Gravitational waves carry enormous amounts of energy, but spread out quickly once they leave the source. Could they ever create black holes?
Traveling back in time is a staple of science fiction movies. But according to Einstein, it's a physical possibility that's truly allowed.
The sharpest optical images, for now, come from the Hubble Space Telescope. A ground-based technique can make images over 100 times sharper.
If you bring too much mass or energy together in one location, you'll inevitably create a black hole. So why didn't the Big Bang become one?
In ~7 billion years, our Sun will run out of fuel and die. So will every star, eventually. Here are the different fates they'll encounter.
In 2017, we detected gold being forged in a neutron star-neutron star merger. Now, in 2024, the amounts created simply don't add up.
The most iconic "dark nebula" of all lights up under JWST's infrared gaze. Here's what's newly discovered inside.
Holograms preserve all of an object's 3D information, but on a 2D surface. Could the holographic Universe idea lead us to higher dimensions?
In general relativity, white holes are just as mathematically plausible as black holes. Black holes are real; what about white holes?
The center of the galaxy doesn't just host stars and a black hole, but an enormous set of rich gassy and dusty features. Find out more!
Galaxies don't simply feed their central supermassive black holes, but the activity generated inside affects the entire galaxy and more.
The second law of thermodynamics tells us that entropy always increases. But that doesn't mean it was zero at the start of the Big Bang.
Although many of Einstein's papers revolutionized physics, there's one Einsteinian advance, generally, that towers over all the rest.
Want to avoid getting "spaghettified" by a black hole? Steer clear of the smaller ones.
Today, supermassive black holes and their host galaxies tell a specific story in terms of mass. But JWST reveals a different story early on.
One newly discovered, ancient star has a composition unlike any other. Explaining its existence is already blowing astronomers' minds.