
Space
A star called ‘Earendel’ could be the most distant ever seen
A thin red arc found in an image from the Hubble Space Telescope shows starlight from nearly 13 billion years ago.
By Liz Kruesi
A thin red arc found in an image from the Hubble Space Telescope shows starlight from nearly 13 billion years ago.
A new cache of confirmed exoplanet discoveries marks a milestone in planets found beyond our solar system.
An atmosphere is an envelope of gas around a planet, dwarf planet or moon.
Constellations are clusters of related things, especially the stars that form patterns in the night sky — some of which date back to ancient times.
Billions of years of meteorite impacts may have transformed much of Mercury's graphite crust into precious gemstones.
Once known as a pipsqueak planet, Pluto is now the solar system’s best known dwarf planet.
The Doppler effect is a perceived change in the frequency of light or sound waves due to the wave source moving relative to an observer.
Dark energy is the unknown force causing the universe to expand faster and faster.
Eyelash-like radio filaments accent the brightest feature in this image — a supermassive black hole.
These carbon-based molecules, found in a meteorite, may reflect merely a mixing of water and minerals on the Red Planet over billions of years.