The first validated Earth-sized planet to orbit a star in the habitable zone, Kepler-186f, has been discovered.  It beats out the current...

Tonight marks an interesting alignment of two bright planets in the sky with our moon.  Through the rest of June you can look up and see...

Tonight marks an interesting alignment of two bright planets in the sky with our moon.  Through the rest of June you can look up and see...

Tonight marks an interesting alignment of two bright planets in the sky with our moon.  Through the rest of June you can look up and see...

Tonight marks an interesting alignment of two bright planets in the sky with our moon.  Through the rest of June you can look up and see...

Tonight marks an interesting alignment of two bright planets in the sky with our moon.  Through the rest of June you can look up and see...

Since Pluto’s discovery by Clyde Tombough in 1930, it has remained a great mystery.  It’s difficult to study since it’s about 3 billion...

Since Pluto’s discovery by Clyde Tombough in 1930, it has remained a great mystery.  It’s difficult to study since it’s about 3 billion...

Since Pluto’s discovery by Clyde Tombough in 1930, it has remained a great mystery.  It’s difficult to study since it’s about 3 billion...

Since Pluto’s discovery by Clyde Tombough in 1930, it has remained a great mystery.  It’s difficult to study since it’s about 3 billion...

Since Pluto’s discovery by Clyde Tombough in 1930, it has remained a great mystery.  It’s difficult to study since it’s about 3 billion...

For over six decades, scientists have speculated that there might be structures of plasma residing in the upper atmosphere of Earth,...

For over six decades, scientists have speculated that there might be structures of plasma residing in the upper atmosphere of Earth,...

For over six decades, scientists have speculated that there might be structures of plasma residing in the upper atmosphere of Earth,...

For over six decades, scientists have speculated that there might be structures of plasma residing in the upper atmosphere of Earth,...

For over six decades, scientists have speculated that there might be structures of plasma residing in the upper atmosphere of Earth,...

While on board the International Space Station, geophysicist Alexander Gerst spent a lot of time looking back down to Earth from 205...

While on board the International Space Station, geophysicist Alexander Gerst spent a lot of time looking back down to Earth from 205...

While on board the International Space Station, geophysicist Alexander Gerst spent a lot of time looking back down to Earth from 205...

While on board the International Space Station, geophysicist Alexander Gerst spent a lot of time looking back down to Earth from 205...