The moon crashing into Earth may sound like an unrealistic doomsday scenario or the stuff of sci-fi disasters. But for some planets in other star systems, such catastrophic collisions may be common. New research published in the journal Monthly Notices of the Royal Astronomical Society uses computer simulations to show that collisions between exoplanets and … Read more
There’s a floating garbage dump orbiting Earth, and it’s getting fuller every year. Space debris — known colloquially as space junk — is the name that scientists give to the thousands of pieces of broken satellites and spacecraft that clog Earth’s orbit. Space junk can be as small as a paint fleck or as large … Read more
Glimpsed only occasionally at the hearts of massive clusters of galaxies, ultramassive black holes are some of the largest and most elusive objects in the universe. These black hole behemoths have masses exceeding that of 10 billion suns, making them far more monstrous than even the supermassive black holes found at the centers of galaxies … Read more
The shredded remnants of the first supernova ever recorded by humans — which appeared in the sky more than 1,800 years ago and vanished within eight months — rise from the cosmic grave in a stunning new image from the National Science Foundation’s NOIRLab. Tinged blood red and swirling around an invisible center of mass, … Read more
Researchers have finally pinpointed the likely origin of mysterious heartbeat-like signals spat out by the sun during solar flares. The findings could help us learn more about how potentially damaging solar storms are unleashed, a new study shows. Solar radio bursts are streams of electromagnetic radiation — made up mainly of radio waves, as well … Read more
If wormholes exist, they could magnify the light of distant objects by up to 100,000 times — and that could be the key to finding them, according to research published Jan. 19 in the journal Physical Review D. Wormholes are theoretical funnel-shaped portals through which matter (or perhaps spacecraft) could travel great distances. To imagine … Read more
The first stars in the cosmos may have topped out at over 10,000 times the mass of the sun, roughly 1,000 times bigger than the biggest stars alive today, a new study has found. Nowadays, the biggest stars are 100 solar masses. But the early universe was a far more exotic place, filled with mega-giant … Read more
Astronomers have spotted a runaway supermassive black hole, seemingly ejected from its home galaxy and racing through space with a chain of stars trailing in its wake. According to the team’s research, which was published April 6 in The Astrophysical Journal Letters (opens in new tab), the discovery offers the first observational evidence that supermassive … Read more
The elusive “Planet Nine,” which may or may not lurk in the outer reaches of the solar system, could be surrounded by a small swarm of potential moons, a new study reveals. What’s more, these moons could be the key to finding the missing planet. Planet Nine, if it exists, lurks beyond the orbit of … Read more
Astronomers have finally weighed an isolated white dwarf, or the shriveled husk of a dead star, using a strange phenomenon predicted by Einstein’s theory of relativity decades ago. The findings confirm astronomers’ predictions about how massive white dwarfs can be, and may help explain the strange, ultra-dense matter that makes up these stellar leftovers. In … Read more
