The Book of Miracles, c. 1550

The Long History of Comet Phobia

Even the invention of the telescope couldn't convince all people to put aside superstitions about comets.
The location of the Earth encircled by the celestial circles, 1661

The Protestant Astrology of Early American Almanacs

The wildly popular books helped people understand farming and health through the movement of the planets, in a way compatible with Protestantism.

Why Your Zodiac Sign Is Probably Wrong

The science of astronomy is at odds with the basic organizing principle in astrology: the dates of the zodiac.
This infographic details the locations of the participating telescopes of the Event Horizon Telescope (EHT) and the Global mm-VLBI Array (GMVA).

Seeing Black Holes

Two of the scientists on the huge team that eventually captured the world's first image of a black hole discuss the particular challenges of the task.
Supermassive black hole

Rotating Black Holes May Serve as Gentle Portals for Hyperspace Travel

Feel like visiting another star system or dimension? You can do this by traveling through a black hole.
Lick Observatory

The Women Who Made Male Astronomers’ Ambitions Possible

In the late 19th century, Elizabeth Campbell helped her astronomer husband run the Lick Observatory and lead scientific eclipse-viewing expeditions.
Hayabusa2 Approaches Asteroid Ryugu

Asteroids Are Windows to the Past

Japan’s space agency has landed rovers on Asteroid Ryugu. The photos and samples from the mission will reveal a lot about asteroids.
Maria Mitchell

America’s First Woman Astronomer

Maria Mitchell became famous when she discovered a comet in 1847. She didn't stop there, fighting for education and equality for women in the sciences.
Victorian eclipse

Solar Eclipse Tourism: The Victorians Were the Pioneers

People have been planning for this month's total solar eclipse for years. They aren't the first to do so: the Victorians pioneered eclipse tourism.
TRAPPIST-1 planet illustration

M-Dwarves and the Search for Life

In recent years, astronomers have broadened their search for habitable planets to include previously ignored stars like M-dwarves.