To receive the same amount of starlight as Mars receives from our sun, a planet orbiting an M-type red dwarf would have to be positioned much closer to its star than Mercury is to the sun. Disclaimer: ...

Neptune’s supersonic winds and icy storms revealed a planet so extreme that it forever changed our picture of the solar ...

This story is a collaboration with Biography.com. Few things seem as immutable than the Sun—after all, it’s been fusing hydrogen for five billion years, and it’ll keep on ticking for about five ...

The story of the birth of our solar system has been worn smooth through years of retelling. It starts billions of years ago with a black, slowly spinning cloud of gas and dust. The cloud collapses, ...

The mysterious Oort cloud is the source of many of our solar system's comets, but astronomers still have no idea what it looks like. Now, new simulations may have given them a first glimpse. When you ...