Andromeda XXXV is only about 20,000 times more massive than our Sun—very small, even for a satellite galaxy. For comparison, ...

A SpaceX mission that was originally planned to launch Wednesday and bring home NASA astronauts Suni Williams and Butch Wilmore, has been delayed, according to SpaceX.A launch pad problem prompted ...

The USD 488 million SPHEREx mission aims to explain how galaxies formed and evolved over billions of years, and how the universe expanded so fast in its first moments. The cone-shaped SPHEREx — at ...