There are two star patterns representing crowns that are visible in our current late-summer evening sky: Corona Borealis (the Northern Crown) and Corona Australis (the Southern Crown).
In the year 1181 AD, a new bright point of light as luminous as the planet Saturn appeared to Chinese and Japanese skygazers for a little more than six months before disappearing.
A new freely downloadable universe simulation reveals the structure of galaxies and galactic clusters over more than 13 billion years of history.
A distant supernova previously imaged by the Hubble Space Telescope will be visible again from Earth and surrounding space in 2037, astronomers predict.
The famous telescope peered into the constellation Sagittarius to view this gorgeous assortment of candy-colored stars.
Scientists detected a repeating radio signal near the center of the Milky Way, and it's unlike anything else they've ever studied.
NASA's long-awaited and high-powered James Webb Space Telescope won't begin observations this year after NASA and its counterpart the European Space Agency (ESA) announced another launch delay.
Astronomers may have captured the best view yet of matter colliding with the surface of a young star, findings that may shed light on what the sun looked like in its youth.
Astronomers have uncovered evidence of explosions triggered by dead stars ramming into live stars, possible proof of a new type of supernova, a new study finds.
Mysterious repeating pulses of radio waves may come from a hitherto unknown kind of extraordinarily powerful cosmic magnet, and not pairs of stars as previously suggested, a new study finds.
A flaming blue sword seems to pierce a giant cosmic heart in a gorgeous new photo captured by the Hubble Space Telescope.
Researchers show how intelligent aliens might draw nearly-limitless power from a black hole using a Dyson sphere.
A new simulation predicts that the lost giants were dislodged by gigantic collisions and have wandered the outskirts of galaxies ever since.
Scientists have figured out the average color of the universe by recording visible light from more than 200,000 galaxies.