Tackling the climate crisis is one of President Joe Biden's top priorities, and NASA has created a new role to match.
We don't know why the universe is dominated by matter over antimatter, but there could be entire stars, and maybe even galaxies, in the universe made of antimatter.
The mystery at the heart of an unexplained, bright point of gamma-ray light in the sky has been solved: a violent, whirling redback.
China's Tianwen-1 spacecraft snapped its first image of Mars as the mission makes its final approach; the probe will enter orbit around the Red Planet in less than a week.
A weird, super-powerful particle that's not truly a particle could have dominated the universe when it was just a second old, releasing a flood of ripples that permeated all of space-time.
Scientists are finally figuring out how much dark matter — the almost imperceptible material said to tug on everything, yet emit no light — really weighs.
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In 2018, one of the brightest X-ray lights in the sky went dark, and scientists still aren't sure why.
SpaceX tested one of its giant, silver "Starship" prototypes Tuesday (Feb. 2). And for the second time in two months, it exploded on landing.
A speculative hypothesis tries to uncover the world’s oldest story written across the night sky in the Pleiades constellation.
It's now possible to send uncrackable quantum messages through thin air, and the people who figured out how to do it are getting ready to send the messages into space.
The car-size Perseverance rover, which launched on July 30 of last year, is scheduled to land inside the 28-mile-wide (45 kilometers) Jezero Crater on Feb. 18.
Minimoon SO 2020, a rocket booster that has been orbiting Earth for about 60 years, will drift off forever next month.
An ongoing investigation of the December collapse of the iconic radio telescope at Arecibo Observatory in Puerto Rico offers early evidence a manufacturing issue may have contributed to the failure.
A mysterious "kick" in the early universe may have produced more matter than antimatter. And that imbalance may have also led to the creation of dark matter, researchers now say.
This hazy spiral galaxy is one of the largest in the Virgo cluster — a collection of more than 2,000 galaxies.