Researchers have found that 'Oumuamua — the first confirmed object to enter the solar system from interstellar space — was a comet, releasing just enough gas to subtly change its course.
New research shows that interactions between small objects beyond Neptune’s orbit —and not a hypothetical Planet Nine — could be the reason some far-flung solar system objects “detach” from their original orbits.
An intriguing asteroid was spotted traveling backwards around Jupiter back in 2015. Now a team of researchers think it could have formed around another star.
This is what the largest available image of the Milky Way using only off-the-shelf photographic equipment looks like.
In a new twist on the giant impact theory, a new idea posits that the Moon might have formed from the vaporized remains of Earth after an epic collision with another planet-sized body.
In 2016 an amateur astronomer was testing his camera — and captured the first flash of a supernova.
NASA’s Juno spacecraft peeked under the clouds of the most iconic weather feature in the solar system, Jupiter’s Great Red Spot, revealing a complex structure deep below the surface.
Astronomers have obtained the most detailed radio image of hydrogen gas in a neighboring galaxy, revealing its structures with more precision than ever before.
Native American tribes each had their own full Moon names — we introduce the most commonly used ones and the traditions behind them.
New interpretations of oral accounts by Aboriginal Australians show that they included references to the variability of red giants Antares, Betelgeuse, and Aldebaran.
Roughly 3.5 billion years ago huge volcanoes released enough gas to cover the Moon with a thin atmosphere that was visible from Earth.
Three American physicists have received the Nobel Prize in physics for their contributions to the discovery of gravitational waves.
The 2017 solar eclipse could easily be the most watched event in US history. Can we learn something from it?
A new survey promises the most complete map of radio-emitting celestial sources ever made. It will reveal thousands of new objects after seven years of observation.
Researchers have found that a football-shaped, ultra-hot gas giant that’s being devoured by its host star is also one of the least reflective exoplanets ever found.
Researchers have found strong evidence of titanium oxide in the atmosphere of a hot giant planet, adding new insights to the complex motions of these planets’ extreme atmospheres.
Thermonuclear power sets off a type of stellar explosion known as a classical nova. Now, new research explains the mechanisms that cause these blasts to light up.
Two years after New Horizons captured the first high-resolution image of Pluto, the IAU releases official names for some of its features.
Counterfeit eclipse glasses created great confusion in the days prior to the solar eclipse. Luckily few cases of eye damage have been reported.
Astronomers and historians pinpoint the source of a 15th-century classical nova. It’s currently regathering strength.
Researchers have constructed a detailed view of the surface of red supergiant star Antares, revealing a chaotic atmosphere powered by mechanisms that are still poorly understood.
We've curated a selection of some of the best pictures our readers submitted to our online gallery of the August 21 solar eclipse.
In addition to clogged roads and crowded hotels, the 2017 solar eclipse had another big effect on U.S. infrastructure: reduced solar power production.
Some academic and citizen-science groups came up with neat initiatives for eclipse day. Let’s find out how they did.
A peculiar white dwarf could be what’s left after a failed supernova explosion.