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year
Table of Contents
Introduction References & Edit History Related Topics
Images & Videos
calendar of Gregory XIII from January to June
Study the different ways of defining a year - a tropical year, a sidereal year, and the anomalistic year
What is Leap Day?
Martian year
Discover the length of days and years on Mercury
Quizzes
barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure
Fun Facts of Measurement & Math
Related Questions
Read Next
Flower. Fruit tree. Cherry. Cherry tree. Cherry blossom. Spring. Close-up of cherry blossoms in bloom.
The Perils of an Early Spring
Ancient Mayan Calendar
Our Days Are Numbered: 7 Crazy Facts About Calendars
February 29, leap day, leap year, happens every four years
Leap Day, February 29
Galaxy clusters like Abell 2744 can act as a natural cosmic lens, magnifying light from more distant, background objects through gravity. NASA's James Webb Space Telescope may be able to detect light from the first stars in the universe if they are gravitationally lensed by such clusters. (astronomy, space exploration, galaxies)
How Fast Is the Universe Expanding?
Calendar marking march 15th
22 Questions About Time and Timekeeping Answered
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
African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.
Timeline of the American Civil Rights Movement
New Zealand. Political/Physical map. Includes locator.
Where Is “Old Zealand”?
King Cobra snake in Malaysia. (reptile)
9 of the World’s Deadliest Snakes
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
Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society
12 Novels Considered the “Greatest Book Ever Written”
Two chicks near an egg with a white background (poultry, chick, chickens, birds).
What Do Eggs Have to Do with Easter?

year: Related Content

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Photos and Videos

calendar of Gregory XIII from January to June
Study the different ways of defining a year - a tropical year, a sidereal year, and the anomalistic year
What is Leap Day?
Martian year
Discover the length of days and years on Mercury
See All Videos and Images →

Related Topics and References

Topics
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Key People

al-Battānī
Arab astronomer and mathematician

Related Quizzes and Features

Quiz
barometer. Antique Barometer with readout. Technology measurement, mathematics, measure atmospheric pressure
Fun Facts of Measurement & Math
List
Ancient Mayan Calendar
Our Days Are Numbered: 7 Crazy Facts About Calendars