Nearly 4.5 million years ago, two enormous, blazing stars swung close to the solar system. They did not touch the sun, but they came close enough to leave a permanent mark on the thin mist of gas that ...

NASA’s newly launched IMAP mission is set to tell us more about the boundary between our Solar System and interstellar space ...

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new simulations show. By Katherine Kornei If our species manages to hang on ...

That star at the center of our Solar System, that superhot ball of plasma that gives us heat and energy, and amazing complexions… well, it’s a ticking time bomb. The Sun is about 10 billion years old.

People sometimes ask what would happen if the Sun suddenly exploded, often after seeing a dramatic film or picture online. It is an understandable question, especially for children, because the Sun ...