"At first, I thought I completely messed up during our research," Olivia Achenbach of the United States Naval Academy told ...

The Hooker telescope was the brainchild of the observatory’s director, George Ellery Hale, and was designed to, among other ...

Pinpointing a Milepost Marker Star that Opened the Realm of Galaxies At the dawn of the 20th century, astronomers faced a ...

Hubble's discovery of expanding galaxies confirmed the universe's vastness, laying the foundation for the Big Bang theory and ...