Charting the expansion history of the universe with supernovae

Extraterrestrial radioactive isotope found in seabed has implications for Earth's origins. The dating of the sample confirms two or more supernova explosions occurred near Earth. "Our data could be the first evidence that supernovae do indeed produce plutonium-244."

Astronomers Discover What Could Be One of The Oldest Stars in The Known Universe

Gaia Might Even be Able to Detect the Gravitational Wave Background of the Universe