Mercury joins the night sky to complete a 7-planet alignment just after sunset for the end of February. Saturn leaves our ...

NASA/ESA Hubble Space Telescope, Gemini North telescope and NASA Infrared Telescope Facility observations of Neptune and ...

Watchers of the Connecticut skies should be able to watch the planets line up for 'parade' in February, and the start of ...

Hubble Space Telescope imagery Neptune has revealed that the planet's clouds are disappearing. Credit: NASA Goddard Space Flight Center ...

NASA’s Voyager mission completed humankind’s first close-up exploration of the four giant outer planets of our solar system.