No matter how many times you see them, the northern lights, or aurora borealis—and ... activity on its surface waxes and wanes. Common in polar and sub-polar regions, auroras can sometimes ...

Known for creating ribbons of colorful light in the night sky, the aurora borealis are polar lights, or aurora polaris, that appear in the northern hemisphere. The southern hemisphere has its ...

Known for creating ribbons of colorful light in the night sky, the aurora borealis are polar lights, or aurora polaris, that appear in the northern hemisphere. The southern hemisphere has its ...

Known for creating ribbons of colorful light in the night sky, the aurora borealis are polar lights, or aurora polaris, that appear in the northern hemisphere. The southern hemisphere has its ...

Known for creating ribbons of colorful light in the night sky, the aurora borealis are polar lights, or aurora polaris, that appear in the northern hemisphere. The southern hemisphere has its own ...

Known for creating ribbons of colorful light in the night sky, the aurora borealis are polar lights, or aurora polaris, that appear in the northern hemisphere. The southern hemisphere has its own ...

SpaceX launched the first human spaceflight directly over Earth's polar regions on Monday -- a days-long, privately funded orbital mission involving four astronauts. Named "Fram2" after the famed ...