The Hubble Space Telescope has turned its sharp eye toward a ghostly swirl of stars and gas known as the "Lost Galaxy," given ...

Discovered on July 1 by the NASA-funded ATLAS telescope in Chile, 3I/ATLAS is only the third confirmed visitor from another ...

New gravitational lensing measurements by the TDCOSMO Collaboration support the Hubble Tension, confirming differences between Early and Late Universe Hubble Constant values using updated ...

New 3I/ATLAS images from NASA and the ESA suggest the interstellar comet is active as it approaches Earth in December.

Amazing views of Jupiter over the years via the Hubble Space Telescope. The moons of Io, Ganymede and hazy Uranus can be ...

A pair of quasars that existed when the universe was only 3 billion years old has been spotted by the Hubble Space Telescope.

I/ATLAS attracted attention when it was confirmed to be only the third body originating from another star system.

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

Interstellar object 3I/ATLAS is making its closest approach to Earth in just over a week from now, coming within 167 million ...

The head of NASA’s astrophysics division offered an upbeat assessment of upcoming missions, a stark contrast to the agency’s ...

For much of the twentieth century, scientists expected the expanding universe to slow over time. The opposite turned out to ...

For the first time, astronomers have captured the brilliance of a superluminous supernova via gravitational lensing.