Planetariums were a hit with the public. Within decades, they had spread around the world – the first planetarium in the ...

A quiet, glowing gas cloud has been hiding in plain sight not far from Earth. For decades, astronomers have predicted that ...

Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...

A pair of European satellites are creating artificial solar eclipses to provide hours of on-demand totality for scientists.

The object gained an official name, C/2025 N1 or 3I/ATLAS, on Wednesday. Moving at a record-setting speed for an interstellar ...