When NASA's New Horizons flew by a distant Kuiper Belt Object on New Year's Day, they nicknamed it "Ultima Thule." Now, the object has received an official moniker: Arrokoth.
The 2019 Nobel Prize in Physics goes to James Peebles and to Michel Mayor and Didier Queloz. The prize, which will be split in half, honors discoveries that have offered new perspectives on our place in the universe.
As protests against the construction of the Thirty Meter Telescope continue, the directors of Maunakea Observatories have taken the unprecedented move of closing all observatories atop the mountain.
Neil Armstrong's and Buzz Aldrin's first steps on the Moon changed the world. But that the world would see them wasn't a given.
In 1900, a man named John Nevil Maskelyne filmed a solar eclipse — the first of its kind.
The transition from sodium lights to LEDs, the so-called “lighting revolution”, was supposed to reduce energy consumption and bring back the starry sky, but new satellite data indicate it’s not working out that way.