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equinox
Table of Contents
Introduction References & Edit History Related Topics
Images & Videos
Earth's orbit
What causes the seasons?
positions of the equinoxes sunlight strikes parts of Earth differently seasonal configuration of Earth and Sun
What is the summer solstice?
Quizzes
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
Encyclopaedia Britannica thistle graphic to be used with a Mendel/Consumer quiz in place of a photograph.
36 Questions from Britannica’s Most Popular Science Quizzes
Related Questions
Read Next
Colorful winter sunset
What's the Difference Between a Solstice and an Equinox?
Encyclopaedia Britannica First Edition: Volume 1, Plate XLIII, Figure 1, Astronomy, Solar System, Equation of Time, Precession of Equinoxes, Earth, orbit, ecliptic, apogee, perigee, line of apsides, mean anomaly, tropical year, Sydereal, Julian
First Day of Fall
Flower. Fruit tree. Cherry. Cherry tree. Cherry blossom. Spring. Close-up of cherry blossoms in bloom.
The Perils of an Early Spring
Planet Earth and lunar moon from space
Where Did the Moon Come From?
solar eclipse, sun, moon, astronomy, space
How Do You Tell the Difference Between Total, Annular, Solar, and Lunar Eclipses?
Discover
Groups of depositors in front of the closed American Union Bank, New York City. April 26, 1932. Great Depression run on bank crowd
Causes of the Great Depression
Candles Burning On Table In Church
What Is the Most Widely Practiced Religion in the World?
Easter Procession of Maria Santisima del Sacromonte in Granada, Spain. This statue is known as Virgen de los Gitanos or The Virgin of the Gypsies.
What is Holy Week?
Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)
7 of the World’s Deadliest Shipwrecks
Titanic infographic. The 30th anniversary of its discovery is September 1, 2015. SPOTLIGHT VERSION.
Timeline of the Titanic’s Final Hours
Fish. Lionfish. Lion-fish. Turkey fish. Fire-fish. Red lionfish. Pterois volitans. Venomous fin spines. Coral reefs. Underwater. Ocean. Red lionfish swims by seaweed.
10 of the World’s Most Dangerous Fish
Two chicks near an egg with a white background (poultry, chick, chickens, birds).
What Do Eggs Have to Do with Easter?

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Photos and Videos

Earth's orbit
positions of the equinoxes
sunlight strikes parts of Earth differently
seasonal configuration of Earth and Sun
What causes the seasons?
What is the summer solstice?
See All Videos and Images →

Related Topics and References

Topics

Related Quizzes and Features

Quiz
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
Encyclopaedia Britannica thistle graphic to be used with a Mendel/Consumer quiz in place of a photograph.
36 Questions from Britannica’s Most Popular Science Quizzes
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz
Demystified
Colorful winter sunset
What's the Difference Between a Solstice and an Equinox?