This means that it takes Mars longer to complete a single orbit ... because an object the size of Earth’s moon slammed into Mars near its south pole. Both hemispheres do have one thing in ...

The top half of the Earth we call the northern hemisphere, and the bottom half we call the southern hemisphere. At this point in the orbit, the Earth’s tilt means that the southern hemisphere is ...

Or be patient: Starting Sunday, days will get a little bit longer in the Northern Hemisphere every single day until late June. These annual changes in sunlight as the Earth revolves around the sun ...