“He was very taken with the thought that no phenomenon becomes a true phenomena until it has been observed,” Wald told Salon ...

Israel's security cabinet is meeting to approve the ceasefire and hostage release deal with Hamas in Gaza. Should the cabinet ...

NASA's Chandra and NuSTAR telescopes have teamed up to study a supermassive black hole-powered quasar that could have played ...

The article explores several potential scenarios for the end of the universe, including heat death, the Big Rip, the Big ...

The universe really seems to be expanding fast. Too fast, even. A new measurement confirms what previous—and highly ...

Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

Contemporary physics still wrestles with a question posed by philosophers millenia ago: What is the universe made of?

The “ghost towns,” named Sculptor A, B, and C, consist of three faint and ultra-faint galaxies about 6.5 million light-years ...