Get the latest Science News and Discoveries

On this day in space! Aug. 17, 1877: Asaph Hall discovers the Martian moon Phobos

On Aug. 17, 1877, American astronomer Asaph Hall discovered Mars's moon Phobos.

None

Get the Android app

Or read this on Space.com

Related news:

Wildfire smoke blankets volcanoes across the Pacific Northwest | Space photo of the day for Aug. 17, 2026

Space: the billionaires’ playground /// As tycoons like Elon Musk attempt to seize space for profit, the Earth is being trashed, writes astronomer Lucian Walkowicz.

Rockets launch almost every day in the US. Here's why a surge in the next decade is expected

« Wildfire smoke blankets volcanoes across the Pacific Northwest | Space photo of the day for Aug. 17, 2026

Extraversion is declining in Japan: Evidence for the "inward-looking" trend that existed as a discourse - EurekAlert! »