The alien planet, called PH1, is a gas giant planet slightly bigger than Neptune.
Voyager 1 seems to have hit the doldrums as it approaches the edge of the sun's sphere of influence. Still, says a lead scientist, 'We all have the sense that something big is imminent.'
Using data from the Hubble telescope, SETI scientists spotted a fifth moon orbiting the icy dwarf planet Pluto.
NASA's Cassini probe has photographed a swirling vortex of gas high above the south pole of Titan, Saturn's largest moon.
The Kepler spacecraft has detected a pair of extrasolar planets with orbits so close that at times the larger planet looms more than twice the size of the full moon in the second planet's night sky.
A duo of very different planets orbit in close proximity but will not collide, but close encounters could cause gravitational tides, says a scientist.
A duo of planets some 1,200 light years from earth have been spotted passing within 1.2 million miles of each other, closer than any other known pair of planets, a new study has found.
Launched in 1977, Voyager 1 is now poised to become the first craft to enter interstellar space.
Comets, perhaps over 80 trillion, circle a young star that houses one alien planet and maybe more. There are thousands of daily comet collisions in the star's orbit.
The findings nearly double the number of bona fide planets found outside our solar system by the Kepler space observatory.