New measurements using gravitational lensing suggest the universe’s current expansion rate does not agree with signals from the early cosmos.

A sudden black hole flare unleashed stunning, near light speed winds that echo the Sun’s most powerful eruptions.

Supernovae aren't one of the JWST's main science themes, but the perceptive telescope is full of surprises. Recently, it ...

Leading scientist Professor Avi Loeb argued it’s “arrogant” to believe we’re alone in a universe teeming with billions of ...

If you feel a thrill every time we discover something new about the cosmos, then November 25th may have been a noteworthy day ...

Allen Telescope Array campaign shows slow changes in radio scintillation that can nudge pulsar timing by billionths of a second ...

The comet is the third object ever confirmed to have entered our cosmic neighborhood from elsewhere in the galaxy. Space ...

Revisiting old data from Voyager 2, scientists have worked out how a dense, shocked region of the solar wind could have ...

NASA scientists are sounding an alarm that would have been unthinkable a decade ago: the same commercial satellite ...

A faint, ancient flash of light detected by the James Webb Space Telescope (JWST) has broken the record for the most distant ...

Data from the James Webb Space Telescope has identified the universe’s most ancient supernova to date. This milestone not only redefines astronomical records but clarifies how the universe’s first ...

Before 3I/ATLAS, the only other confirmed interstellar tourists we've seen were the now-famous, cigar-shaped 'Oumuamua' in ...