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A solstice is the time when the Sun reaches its most northerly or southerly excursion relative to the celestial equator on the celestial sphere. Two solstices occur annually, around June 20–22 and December 20–22. In many countries, the seasons of the year are defined by reference to the solstices and the equinoxes .
Mar 12, 2024 · Learn what a solstice is, how it affects Earth's seasons and daylight, and how different cultures celebrate it. Explore the science and history of solstices on Earth and other planets.
Jun 20, 2024 · Learn what a solstice is and when it occurs in the Northern and Southern Hemispheres. Find out how the Sun's path and the seasons are related to the solstices and the equinoxes.
Learn how solstices and equinoxes mark the changing of the seasons on Earth due to its tilted axis. Find out when and where they occur, and how they affect day and night length.
Learn about the June solstice, when the Sun is directly above the Tropic of Cancer in the Northern Hemisphere. Find out why it marks the start of summer in the North and winter in the South, and how the date and time vary depending on the time zone.
Learn how Earth's tilt and orbit around the Sun cause the equinoxes and solstices, the moments when day and night are equal or longest. Find out when they occur in different hemispheres and on other planets.
Jun 28, 2024 · Summer solstice, the two moments during the year when the path of the Sun in the sky is farthest north in the Northern Hemisphere (June 20 or 21) or farthest south in the Southern Hemisphere (December 21 or 22). Learn more about the summer solstice in this article.
