Distance records are an excellent proxy for the state of the art in astronomy. Finding extremely faraway galaxies is hard. In ...

A new set of precision distance measurements made with an international collection of radio telescopes have greatly increased the likelihood that theorists need to revise the “standard model” that ...

New telescope instruments now reveal distant galaxies in detail, reshaping how astronomers map dark matter, star formation, ...

Astronomers used gravitational lensing to detect a supernova 10 billion light-years away, providing spatially separated images that help study cosmic expansion and early Universe events.

But there are several important anomalies, including a widely debated one called the Hubble tension. It is named after Edwin ...

Using a cosmic magnifying glass to peer into the deepest reaches of space, two teams of astronomers have discovered tiny galaxies that may be among the most distant known. Images suggest that one of ...

If the Universe is 13.8 billion years old, and the speed of light is truly our cosmic speed limit, how far away should we be able to see? The answer seems obvious: 13.8 billion light-years, since a ...