Scientists may have finally found the universe’s missing matter - hidden in invisible hydrogen gas far beyond galaxies.

Astronomers tallying up all the normal matter—stars, galaxies and gas—in the universe today have come up embarrassingly short ...

A team of astronomers at the University of Milano-Bicocca has uncovered a colossal spiral galaxy that existed just 2 billion years after the Big Bang, which gave birth to the universe some 13.8 ...