Astronomers use many methods to determine this number, including gravitational lensing, the universe’s expansion rate, and more.

A Rutgers-led team of scientists has uncovered evidence of how galaxies expand by tracing the invisible scaffolding of the ...

Most cosmologists believe that these stars were the first large, free-floating structures to illuminate our universe, and ...

IT IS ONE of the biggest mysteries in cosmology—and getting bigger all the time. Ever since Edwin Hubble, an American astronomer, published observations of distant galaxies in 1929, scientists have ...

Knowable Magazine reports that neutrinos may help explain the universe's missing antimatter, shedding light on ...

A neutrino sensor array, ARCA, lines the Mediterranean seafloor near Sicily. A physicist took ARCA’s first huge win to a warm ...