Physicists are figuring out how close you can get to a black hole before you are unlikely to escape. That threshold is called the innermost stable circular orbit (ISCO).
The asteroid that sealed the dinosaurs' fate at the end of the Cretaceous struck at an angle that was the worst-case scenario for life on Earth.
Two entirely different ways of "weighing" the cosmos are producing disparate results. The discrepancy could be a sign that physicists will need to revise the standard model of cosmology.
The weirdness of our solar system's first known interstellar visitor stems from a very unusual composition, a new study suggests.
This morning (May 29), our star fired off its strongest flare since October 2017, an eruption spotted by NASA's sun-watching Solar Dynamics Observatory.
The closest alien planet to our solar system is even more Earth-like than scientists had thought, new observations suggest.
Scientists have a new explanation for an explosive cosmic event in 1908 that flattened trees for hundreds of miles in a remote Siberian forest.
For a week, it was a truly stunning crumb of the solar system — until scientists realized it was just a dirty hunk of ice with an identity crisis.
European satellites are investigating the development of two distinct weak points within the South Atlantic Anomaly of Earth's magnetic field.
Using gravitational waves to approximate pi, physicists see no problem with Einstein's theory of general relativity.
Eleven billion years ago, a hot, active, eyeball of a galaxy glared across space. It formed in a violent collision, and could help explain the Milky Way's spiral.
A team of researchers at the University of Tokyo has revealed tantalizing details about Mars’ seismic activity for the very first time.
Satellites are keeping a careful watch on Typhoon Amphan during and after landfall near eastern India and Bangladesh Wednesday (May 20).
A massive, rotating disk galaxy that first formed just 1.5 billion years after the Big Bang, could upend our understanding of galaxy formation, scientists suggest in a new study.
Researchers using China's huge new FAST radio telescope are piecing together a technological strategy to carry out a major and sweeping search for extraterrestrial intelligence (SETI).
After delays from the coronavirus pandemic, NASA has picked a date for its spacecraft to snatch up a chunk of space rock to bring home.
NASA has renamed its Wide Field Infrared Survey Telescope (WFIRST) to honor the renowned astronomer Nancy Grace Roman, also known as the "mother of Hubble."
New imagery apparently pinpoints the spot where a baby planet is forming around the young star AB Aurigae, which lies 520 light-years from Earth.
Do you thrive in social isolation? NASA is looking for people to spend 8 months locked in a Russian lab for a new experiment.