NASA's next big eye on the cosmos is now fully assembled. On Nov. 25, technicians joined the inner and outer portions of the Nancy Grace Roman Space Telescope in the largest clean room at the agency's ...

NASA’s latest Mars mission is not taking the familiar highway. Instead of a direct cruise along the classic Hohmann transfer, ...

If you look across space with a telescope, you'll see countless galaxies, most of which host large central black holes, ...

Most of the universe is made up of dark matter and dark energy. The majority of everything else is dispersed throughout space ...

"Precision in these measurements is critical, as even subtle discrepancies could signal deviations from the model — ...

From unexpected pop pivots to reflections on the state of the world, these are the essential songs of the year.

Across the galaxy, astronomers now see that planetary systems fall into four broad classes, and our own solar system, part of the rare Ordered group, is only one of them. At the same time, discoveries ...