The Milky Way glitters in the predawn sky over Portugal's Guadiana River in this image by astrophotographer Sérgio Conceição.
The Science Channel series "Space's Deepest Secrets" returns tonight (March 19) at 10 p.m. EDT with a look at a mysterious interstellar visitor.
The concept of atoms had been floating around off and on for a few millennia, but it took some clever experimentation to pinpoint their existence.
If the White House's proposed 2020 budget is enacted, NASA won't have the money to develop an ambitious, big-budget space telescope for the foreseeable future.
A new image from the European Southern Observatory captures a cosmic bat tucked away in one of the darkest corners of the Orion constellation.
The CHIME radio telescope aims to explain two poorly understood cosmic phenomena, one dating back to the early universe and one taking place today.
A gigantic solar storm hit Earth about 2,600 years ago, one about 10 times stronger than any solar storm recorded in the modern day, a new study finds.
A particularly odd, spinning star has woken up, and it's spitting bright flashes of radio waves at us again.