Scientific American

Is Earth the only planet with total solar eclipses?

On August 12, 2026, lucky viewers in and around Greenland, Iceland and Spain—weather allowing—will be able to see one of ...

A new satellite wants to prove nuclear power can work in space without solar panels

BOHR's primary mission is to test a different kind of power source in orbit. The CubeSat is carrying City Labs' "NanoTritium" ...

New Horizons watches the solar wind as it slows down

Where does the solar system end and interstellar space begin? That's a question scientists have been working to answer using ...