Could a giant planet between Mars and Jupiter have doomed Earth? A new study suggests that small changes would have been ...

Using in part the Gemini North telescope, one half of the International Gemini Observatory, partly funded by the U.S.

Beginning around sunset, Saturn will be situated closest to the horizon, followed by Mercury, Venus, Jupiter and Mars higher ...

NASA’s Europa Clipper is using Mars and Earth’s gravity to travel efficiently to Jupiter. The spacecraft will study Europa’s ...