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Where is the universe’s missing matter?
When astronomers add up the mass of all the normal matter in the present-day universe, about a third of it can't be found. Where is it?
February 20, 2019
A solar flare 10 billion times more powerful than sun’s
Our sun's solar flares are an incredible natural phenomenon, but now astronomers have observed a flare on a young star that almost defies belief. It's 10 billion times more powerful than any seen on our sun!
February 19, 2019
Volcanic activity under Mars’s surface?
Mars has long been thought to be a geologically dead world. Could there still be volcanic activity beneath its surface? A subsurface lake at Mars' south pole suggests that possibility.
February 17, 2019
From Chelyabinsk to Cuba: The meteor connection
The scientific team that used YouTube videos to determine the trajectory of the Chelyabinsk meteor used the same method to track the trajectory of the bright meteor that crossed the sky over Cuba on February 1.
February 15, 2019
5 things about radiation donuts, in 2 minutes
Did you know that our planet has radiation donuts? These giant, donut-shaped clouds of radiation are called the Van Allen Belts.
February 15, 2019
Mars Opportunity rover ends its mission
The Mars Opportunity rover, built to last 90 days, has ended its mission after 15 years on the red planet.
February 14, 2019
New Hubble images show storms on Uranus and Neptune
Uranus and Neptune - the ice giants of the solar system - are distant worlds last visited by the Voyager 2 spacecraft in the late 1980s. But the Hubble Space Telescope is still keeping an eye on them and their dynamic atmospheres.
February 13, 2019
Time to watch for spring fireballs
The rate of fireballs - or bright meteors - often goes up in the Northern Hemisphere by as much as 30% from February through April.
February 13, 2019
See China’s Chang’e 4 on moon’s far side
China's Chang'e 4 lander has produced fantastic, 1st-time surface views of the far side of the moon. Now a NASA orbiter has caught images of the landing site.
February 13, 2019
ExoMars rover named for Rosalind Franklin
The European Space Agency has named its life-seeking ExoMars rover - due to launch in 2020 - for Rosalind Franklin, a British chemist who helped reveal the mysteries of DNA.
February 12, 2019
