Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, ...

For years, astronomers have toyed with the idea that the Sun hides an extra planet so distant and dim that even the best ...

By comparing those fingerprints to 20 different molecules that they would potentially expect to observe in the atmosphere, ...

ESO’s Visible and Infrared Survey Telescope for Astronomy (VISTA) has delivered amazing imagery of nearby stellar nurseries.

Tsuchinshan-ATLAS was that rare type of comet that arrived with fanfare and lived up to the hype, serving up naked-eye views ...

MIT physicists have captured the first images of individual atoms freely interacting in space. The pictures reveal ...

I n a world first, Chinese scientists have been able to find a satellite using an infrared laser during the daytime. The ...