Space
A rare glimpse of a star before it went supernova defies expectations
A hydrogen-free supernova in a nearby galaxy appears to have come from an unusual source.
Space
More Stories in Space
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Planetary ScienceNASA’s Perseverance rover split CO2 to make breathable air on Mars
An oxygen-making experiment on Perseverance shows that astronauts will one day be able to make air to breathe and, better yet, rocket fuel.
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AstronomyMysterious ‘yellowballs’ littering the Milky Way are clusters of newborn stars
The first comprehensive analysis of the celestial specks indicates they are clusters of infant stars of various masses.
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SpaceFast radio bursts could help solve the mystery of the universe’s expansion
Astronomers used fast radio bursts for the first time to measure the Hubble constant in hopes of ending the debate on the universe’s expansion rate.
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AstronomyNeutron stars may not be as squishy as some scientists thought
NASA’s NICER X-ray telescope finds that the most massive known neutron star has an unexpectedly large diameter.
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Planetary ScienceNASA’s Ingenuity helicopter made history by flying on Mars
An autonomous helicopter just lifted itself into the air on Mars, marking the first time a vehicle has flown on a planet other than Earth.
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Planetary ScienceHow the laws of physics constrain the size of alien raindrops
Physics limits the size of raindrops, no matter what they’re made of or what planet they fall on.
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Planetary ScienceEarth sweeps up 5,200 tons of extraterrestrial dust each year
Thousands of micrometeorites collected from Antarctica come from both comets and asteroids, a new study suggests.
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AstronomyA record-breaking, oxygen-starved galaxy may be full of gigantic stars’ shrapnel
The newly discovered galaxy may have once been home to stars more than 300 times as massive as the sun — a peek at conditions in the early universe.
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Planetary ScienceA meteor may have exploded over Antarctica 430,000 years ago
Tiny spherules recovered from a mountaintop suggest a space rock broke apart midflight and sprayed debris across thousands of kilometers.