Human World
Spaceflight
Crew emerges from Mars habitat simulation after yearlong test
On October 31, 2026, 4 participants in NASA's Mars habitat simulation emerged after 1 year of testing for what astronauts might encounter on a visit to Mars.
Constellations
Pegasus the Flying Horse, and the best sky story ever
Pegasus the Flying Horse is the 7th largest constellation. It dominates fall skies in the Northern Hemisphere and has a famous asterism called the Great Square.
Space

Swift spacecraft fiery reentry expected within the next 24 hours

The Swift spacecraft is falling back to Earth. It will likely burn up in our atmosphere on November 4. Will you see it?
Space

When will the Blaze Star erupt? Will neutrinos give us a warning?

Astronomers are still waiting for the Blaze Star to erupt. New research suggests neutrinos could provide an early warning of its next outburst.
Sun

Sun news: New sunspot turns magnetically complex

Sun news November 4, 2026: Newcomer sunspot AR4566 just turned magnetically complex. Could it fire an M- or even an X-class flare? Stay tuned!
Astronomy Essentials
Tonight

Visible planets and night sky guide for November

Visible planets and night sky guide. Tomorrow morning, before dawn, look for brilliant Venus, bright Jupiter and red Mars. And watch for Taurid meteors!
Human World

Dark sky conference: Under One Sky, November 6-7

On November 6-7, 2026, DarkSky International will hold a virtual dark sky conference called Under One Sky. Learn more about it and light pollution here.
Earth
Space

How to see Earth’s shadow at sunrise and sunset

You can see Earth's shadow in both the evening and morning sky. It appears as a bluish band opposite the sun. And you might see the Belt of Venus too.
Space

Did comets seed life on Earth? A new study says — probably not

Did comets seed life on Earth? It's unlikely, a new study from the University of Cambridge says. It would have been a very rare occurrence.
Space

Do black holes split into smaller black holes?

Black holes sometimes merge. But could 1 split into 2 or more? A new study explores the conditions that might allow it, including extremely rapid rotation.