Roughly 400,000 years after the Big Bang, the universe cooled just enough to allow photons to escape from the primordial ...

Scientists using observations from NASA's Neil Gehrels Swift Observatory have discovered, for the first time, the signal from ...

Across the Ozarks, many people noticed an unusual sight in the sky on Tuesday. A partial rainbow near the sun. The optical ...

Hubble unexpectedly finds double quasar: This image from the NASA/ESA Hubble Space Telescope shows a pair of quasars ...

Scientists using observations from NASA's Neil Gehrels Swift Observatory have discovered, for the first time, the signal from a pair of monster black holes disrupting a cloud of gas in the center of a ...

Recent results suggest these exotic objects just might help us account for the mysterious force pushing the universe apart.

British writer Samantha Harvey has won the Booker Prize for fiction with “Orbital,” a short, wonder-filled novel set aboard ...

Scientists using observations from NASA’s Neil Gehrels Swift Observatory have discovered, for the first time, the signal from ...

The kilonova briefly mimicked the conditions immediately following the Big Bang, and allowed scientists to confirm the source ...

In the constellation Dorado, 49 million light-years from Earth, the barred spiral galaxy NGC 1672 has been imaged by the NASA ...

The results of our study provide the first solid evidence that globular clusters formed through multiple star-formation ...

Astronomers revisited decades-old data from NASA’s Chandra X-ray Observatory, discovering bright, clumped “knots” in an ...