An artist’s impression of a possible ninth planet. It would be quite large — at least as big as Earth — with a thick atmosphere around a...

An artist’s impression of a possible ninth planet. It would be quite large — at least as big as Earth — with a thick atmosphere around a...

We might be half-way through 2015 but there are still 7 upcoming stargazing events that you won’t want to miss. July 10: Get a Glimpse of...

We might be half-way through 2015 but there are still 7 upcoming stargazing events that you won’t want to miss. July 10: Get a Glimpse of...

We might be half-way through 2015 but there are still 7 upcoming stargazing events that you won’t want to miss. July 10: Get a Glimpse of...

We might be half-way through 2015 but there are still 7 upcoming stargazing events that you won’t want to miss. July 10: Get a Glimpse of...

We might be half-way through 2015 but there are still 7 upcoming stargazing events that you won’t want to miss. July 10: Get a Glimpse of...

Carl Sagan once proposed the idea of sailing through the cosmos via a solar-powered spacecraft.  This spaceship would use sunlight...

Carl Sagan once proposed the idea of sailing through the cosmos via a solar-powered spacecraft.  This spaceship would use sunlight...

Carl Sagan once proposed the idea of sailing through the cosmos via a solar-powered spacecraft.  This spaceship would use sunlight...

Carl Sagan once proposed the idea of sailing through the cosmos via a solar-powered spacecraft.  This spaceship would use sunlight...

Carl Sagan once proposed the idea of sailing through the cosmos via a solar-powered spacecraft.  This spaceship would use sunlight...

North America is predicted to have the best view of a possible new meteor shower from Comet 209P/LINEAR Friday night through Saturday...

Cosmic Inflation now has the ‘smoking gun’. “The minuscule ripples in space-time are the last prediction of Albert Einstein’s 1916...

Cosmic Inflation now has the ‘smoking gun’. “The minuscule ripples in space-time are the last prediction of Albert Einstein’s 1916...

Cosmic Inflation now has the ‘smoking gun’. “The minuscule ripples in space-time are the last prediction of Albert Einstein’s 1916...

Cosmic Inflation now has the ‘smoking gun’. “The minuscule ripples in space-time are the last prediction of Albert Einstein’s 1916...

Cosmic Inflation now has the ‘smoking gun’. “The minuscule ripples in space-time are the last prediction of Albert Einstein’s 1916...

“NASA plots daring flight to Jupiter’s watery moon” (Credit: NASA/JPL/Ted Stryk) On March 4, 2014 Charles Bolden, NASA Administrator,...

“NASA plots daring flight to Jupiter’s watery moon” (Credit: NASA/JPL/Ted Stryk) On March 4, 2014 Charles Bolden, NASA Administrator,...