What kicked off the Earth’s rapid cooling 12,800 years ago?
Can you spot the teeny-tiny planet Mercury in this photo of the sun? The European Space Agency's Proba-2 satellite captured this image of Mercury's transit yesterday.
If tiny concentrations of carbon dioxide can hold enough heat to create a global warming impact on Earth, why is Mars cold? Its atmosphere is 95% carbon dioxide.
On Nov. 11, 2019, the planet Mercury crossed the face of the sun in a rare Mercury transit. See amazing photos of the transit, the last until 2032, from NASA and around the world!
Curiosity is the last functioning rover on Mars, and its lonely mission has taken the robot to a steep mountain in the middle of a vast crater.
SpaceX is planning to launch the second installment of its Starlink megaconstellation on Monday (Nov. 11), and astronomers are waiting to see — well, precisely what they will see.
Mercury will fly across the sun (from Earth's perspective) on Monday, and NASA has a whole lot of kids' materials ready for the occasion.
On Monday, students across the U.S. will use Mercury's transit to measure the distance between Earth and the sun.
A new model of the whole Earth shows how the mantle and crust drive the movement of tectonic plates as well as the creation and destruction of supercontinents.
Sending scientific instruments to the edge of the heliosphere, or the sun's region of influence, is like going to the edge of the fish bowl.
Mathematicians have uncovered a big new piece of evidence for one of the most famous unproven ideas in mathematics, known as the twin prime conjecture.
The brightest X-ray burst ever observed by NICER released as much energy in 20 seconds as our sun does in about 10 days.
India has launched just three planetary-science spacecraft, but the country is already eyeing a new destination: Venus.
A brand-new particle has possibly emerged and is altering the future destiny of our entire cosmos, a physicist says.
Among the dozens of spacecraft that have visited the moon, none can come close to the tenure of NASA's Lunar Reconnaissance Orbiter, which recently marked a decade studying our sibling world.
Flying at the very tip-top of Earth's atmosphere, SOFIA has almost as clear a view as space-based telescopes.
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