Harvard Observatory, 1899

How Women Finally Broke Into the Sciences

Women finally broke into the sciences in sex-segregated jobs in the years between 1880 and 1910.
Haumea, a dwarf planet

The Weirdest Dwarf Planets Discovered So Far

The solar system is apparently more crowded than we thought: astronomers have discovered a new dwarf planet. Some dwarf planets don't play by the rules.
Black Hole illustration

What’s On the Other Side of a Black Hole?

What would happen if you entered a black hole?
Sirius

What Are the Dog Days of Summer?

The "dog days of summer" are attributed to the rise of Sirius, the Dog Star, but research into the lore suggests another dog entirely.

Sending Tiny Robots to the Nearest Star

A group of astrophysicists think they have found a way to send a probe to the newest star system, Alpha Centauri.
The Hubble Space Telescope as seen from the departing Space Shuttle Atlantis, flying STS-125, HST Servicing Mission 4.

Happy Birthday, Hubble Telescope!

This year, the Hubble Telescope celebrates its 26th year in space. 
Credit: NASA/JPL/University of Arizona
Caption: Alfred McEwen

The Canals of Mars

We now know there's liquid water on Mars, according to NASA. But at the turn of the 20th century, we believed something else: that Mars had canals.

Ole Rømer and the Speed of Light

September marks two significant dates in the early history of astronomy and physics—the birthday of Danish astronomer Ole Rømer ...