NASA Explains the 2021 Summer Solstice and Earth's Axial Tilt

Summary

NASA explains the summer solstice occurring on June 20, 2021, in the Northern Hemisphere. The article describes how Earth's axial tilt causes seasons, with the Northern Hemisphere tilted toward the Sun during summer and away during winter. Solstices occur twice yearly at the points where this tilt is most pronounced, resulting in the longest day of the year in the summer hemisphere.

Source

Twitter / XNASA Explains the 2021 Summer Solstice and Earth's Axial Tiltgo.nasa.gov