Discovered over the summer, the comet known as 3I/Atlas will pass within 167 million miles of our planet on Friday. That's as ...

The telescope was built back in 1913 for the Illinois Watch Company in Springfield. Its nine-inch refractor lens was crafted by the famous Petitdidier, a skilled optician who crafted lenses for the ...

Astronomers have long been concerned about reflections from satellites showing up in images taken by telescopes and other ...

People love to imbue their hobbies with sweeping universal significance. In "Seeing in the Dark," a one-hour film that airs tonight at 8 on PBS, Timothy Ferris presents an ode to the craft of ...