Space Station Sees Meteor over California Coast

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)
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)

Happy Solstice, Skywatchers

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!

During the solstices, Earth reaches a point where its tilt is at the greatest angle to the plane of its orbit, causing one hemisphere to receive more daylight than the other.
During the solstices, Earth reaches a point where its tilt is at the greatest angle to the plane of its orbit, causing one hemisphere to receive more daylight than the other. (NASA/Genna Duberstein)

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 day. That is why we have day and night, and why every part of Earth’s surface gets some of each.

Earth’s axis is always tilted 23.5˚ with respect to the Sun. Today, the north pole is tipped toward the Sun, and the south pole is tipped away from the Sun. The northern summer solstice is an instant in time when the north pole of the Earth points more directly toward the Sun than at any other time of the year.

The solstice—meaning “sun stands still” in Latin—occurs at 10:54 a.m. CDT.