In the not-so-distant past, the Earth was battered by much more extreme solar storms. Evidence of these storms has come, in particular, from analysing levels of radioactive carbon – known as radiocarbon, or carbon-14 – in tree rings.
SpaceX has stacked and tested its Starship megarocket ahead of the vehicle's fifth flight, which isn't expected to launch until late November.
The United States is partnering with India to establish a new factory that will manufacture microchips to enable next-generation technologies for the U.S. Space Force.
Scientists have found nuclear weapons could actually help deflect an incoming cosmic impact — not by blowing an asteroid up, but by showering it with X-ray radiation.
China launched separate sets of Earth-observation and "Internet of Things" satellites into orbit on Friday (Sept. 20) on two different missions.
SpaceX has retrieved from the sea the first-stage booster that flew on its latest Starship test flight, which launched this past June.
Astronomers have cataloged over 500 gamma-ray bursts, which are some of the most violent explosions in the cosmos.
Three crewmates have landed Earth after a record-long stay on the International Space Station (ISS) for two of them. For one, the 374 days has amounted to only a third of his total time in space.
The largest Einstein Cross dwells among a rare arrangement of seven gravitationally lensed galaxies called the Carousel Lens located between 7 billion and 12 billion light-years from Earth.
The Hubble tension, a longstanding problem in cosmology, could potentially be relieved if early dark energy is taken into account.
Life remains busy for the astronauts aboard China's Tiangong space station, with a range of drills, maintenance and experiments to carry out.
The sunspot AR3835 erupted on Sunday (Sept. 22) during Earth's equinox when even a glancing blow can cause a geomagnetic storm.
A preview of Marvel Comics' "Alien: Romulus #1," a prequel that will be released in October.
Astrophotographer Miguel Claro captured an incredibly detailed timelapse of solar activity, revealing a roiling sun sprouting several massive loops of plasma.
The astronauts and Crew Dragon capsule that will fly SpaceX's Crew-9 mission to the ISS have made it to Florida's Space Coast for their planned Sept. 26 liftoff.
NASA's Perseverance Mars rover will soon arrive at its first stop during its arduous trek to the western edge of Jezero Crater.
The autumnal equinox brings fall to the Northern Hemisphere today as the sun passes directly over the equator at noon. But are day and night actually equal length today?
A NASA astronaut and two record-setting Russian cosmonauts are set to head back to Earth on Monday (Sept. 23), and you can watch their homecoming live.
Canada's Avro Arrow supersonic jet was suddenly canceled in 1959, a controversial decision that benefited NASA. How is Canada preserving the few pieces of the aircraft that remain?
SpaceX's Crew-9 mission to the International Space Station on Sept. 26 will be a rescue mission of sorts, bringing up empty seats for two NASA astronauts currently in space without a ride home.
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