The eighth planet from the sun, Neptune was the first planet located through mathematical predictions rather than through regular observations of the sky. (Galileo had...

Curved features on Jupiter’s moon Europa may indicate that its poles have wandered by almost 90°, report scientists from the Carnegie Institution, Lunar and...

Giove-B, a test satellite for Europe’s Galileo system, has sent its first navigation signals back to Earth.

The European Parliament yesterday agreed to provide funding for the Galileo satellite navigation project which should effectively replace the American GPS system...