If you were up early enough on Friday, Sept. 19, you may have noticed the bright star shining next to the crescent moon in the morning sky. If you missed the view on Sept. 19, will you get another ...

The interstellar comet 3I/ATLAS is not just a visual spectacle but also a scientific treasure. As the third such interstellar ...

V Sagittae’s violent mass transfer hints at an imminent nova—and a future supernova visible from Earth. Binary star systems are fairly common in the universe, as are pairs where one star is a compact ...

A celestial event called a conjunction featured the moon, Venus, and the star Regulus on Sept. 19. The trio will still be shining on Sept. 20, but Venus and Regulus will be further from the moon. The ...