Watch the Skies

The Expedition 59 crew on board the International Space Station captured this image of a meteor at 7:21:23 GMT on May 10, on a night pass over the Pacific Ocean and California coast. (Image courtesy of the Earth Science and Remote Sensing Unit, NASA Johnson Space Center)

It’s the first day of summer here in the Northern Hemisphere, and the first of winter in the Southern Hemisphere. Why the difference? It’s all about Earth’s tilt! Earth’s axis is an imaginary pole going right through the center of Earth from “top” to “bottom.” Earth spins around this pole, making one complete turn each …