The distances between stars are vast, which is why star travel is so far. But now, a new solar sail may be able to travel to Alpha Centauri in 20 years.
Astronomers have spotted the tightest-knit pair of supermassive black holes ever seen. They will collide in 10,000 years, shaking the fabric of spacetime.
The science instruments and hardware for the Europa Clipper spacecraft are coming together in the final phase before a launch to Jupiter’s moon Europa in 2024.
The impact of Russia’s invasion of Ukraine reaches into space, as Russia threatens to stop cooperating on supplying and participating in space missions.
Scientists have made the most detailed observations of Venus' equatorial nightside winds, which are connected to the planet's runaway greenhouse effect.