Stephen Hawking’s most famous theory about black holes has just been given a sinister update — one that proclaims that everything in the universe is doomed to evaporate. In 1974, Hawking proposed that black holes eventually evaporate by losing what’s now known as Hawking radiation — a gradual draining of energy in the form of … Read more
The sun is an ordinary star, but it’s not the only kind of star out there. Most stars in our galaxy are M dwarfs (sometimes called red dwarfs), which are significantly smaller and redder than the sun — and many of them may have the potential to host life, new research shows. A new reanalysis … Read more
Space is famously considered the “final frontier” — but what part of space are we even talking about? Space, outer space and deep space are used somewhat interchangeably in many contexts, but astronomers have come up with clear distinctions between them. So, what’s the difference between them? The term outer space refers to anything beyond … Read more
Rest easy: Earth probably won’t be creamed by a killer asteroid in the next 1,000 years. New research accepted for publication in The Astronomical Journal and available on the preprint server arXiv.org finds that none of the kilometer-wide (0.6 mile) asteroids that travel near Earth are likely to hit the planet in the next millennium. … Read more
After more than a year together on the Red Planet, NASA’s Perseverance rover and its hitchhiking “pet rock” have finally parted ways. The stone had been lodged in one of the rover’s wheels for more than half of its mission on Mars. Perseverance accidentally picked up the pet rock in its front left wheel on … Read more
An ethereal whirlpool of light recently appeared in the night sky above Alaska, briefly stealing the limelight from a strong auroral display. But the bizarre, spiral-shaped object had nothing to do with the dancing polar lights. Instead, the luminous vortex was just the latest example of what astronomers have nicknamed “SpaceX spirals,” which are becoming … Read more
Gravity can turn itself into light, but only if space-time behaves in just the right way, a research team has found. Under normal circumstances, you cannot get something from nothing. Specifically, the Standard Model of particle physics, the reigning theory that explains the subatomic zoo of particles, usually forbids the transformation of massless particles into … Read more
After 65 years of lunar exploration, the United States is finally going to put its first autonomous rover on the moon. But this mission won’t be helmed by NASA engineers — instead, it is the brainchild of a dedicated group of college students. The Iris rover was developed by students, faculty and alumni at Carnegie Mellon … Read more
Neptune is famously a vivid blue, but the asteroids orbiting near it are decidedly not. An international team of astronomers recently took a peek at Neptune’s Trojan asteroids and found that they all seem to be some shade of red — far redder than most asteroids in the solar system. They published their results Feb. … Read more
Astronomers have discovered one of the largest black holes ever found — an ultramassive monster roughly 30 billion times the mass of the sun — using a space-time trick predicted by Albert Einstein. The colossal black hole, which lurks 2.7 billion light-years from Earth in the brightest galaxy of the galaxy cluster Abell 1201, was … Read more
