Some of these open clusters are pretty famous, such as the Pleiades cluster, also known as the Seven Sisters. This is ...

From a Mars rover selfie to an astronaut's view of the flower moon, these space images will give you a new perspective on our planet and our universe. Check Out the Coolest Space Photos of 2025 ...

The types of star she observed would soon be named Cepheid variables. Leavitt had studied Cepheids in the Small Magellanic Cloud (SMC), a dwarf galaxy close to the Milky Way that is visible in our ...

It also shows stars from the vantage point in space. Pettit built his own star tracker, of course, to make this happen. And finally, Earth's atmosphere is a showstopper by itself.