The country supports some of the world’s most important satellites. But experts worry about its proximity to Russia.

Earth experiences seasonal changes because its axis is tilted so different areas of the planet face the sun's direct rays through the year. When the North Pole tilts ... What you can see tonight ...

Australian polar explorer Eric Philips will be launched into space as part of the first crewed mission to orbit the North and ...

Up for a challenge? If skies are clear, you may be able to complete a rare feat of visual athletics this coming weekend, and follow Venus on its trek from the evening into the morning sky.

the Arctic Circle (the North Pole) the Antarctic Circle (the South ... First, I’m going to find out which half of the Earth he’s on. Running around the middle of the planet is an imaginary ...

Antarctica’s total ice volume is now estimated at 27.17 million cubic kilometers (6.52 million cubic miles). The ice sheet ...

The aurora borealis has jumped to the top of many travelers' wish lists, creating a tourism boom in the northernmost reaches ...

NASA astronaut Don Pettit captured this stunning long-exposure view of Earth and stars from space at night from the ...

NASA astronaut Don Pettit has published a surreal video and photograph of Earth that resembles the ending of Christopher ...

When the A-84 iceberg calved in January, it unveiled a 209-square-mile swath of seafloor. Nearby scientists rushed to the ...

NASA’s new video is also just fun to watch. The animation shows what the seafloor looks like off the coasts of Mexico, South ...

Meteorological spring starts on March 1 and is based on annual temperature cycles, while astronomical spring starts on March 20 and is based on the Earth's position relative to the sun.