constant of aberration

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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?

Arrangement of the phases of the moon in total eclipse with Blood Moon

9 Celestial Omens

Solar system illustration. (planets; sun)

Why Are Planets Round?

Spiral Galaxy type Sa-Sb or Sa/Sb in the constellation Virgo. The majestic Sombrero Galaxy Messier 104 (M104) or NGC 4594. The team took six pictures of the galaxy, stitched them together to create the final composite image. Photo from May-June 2003

9 Britannica Articles That Explain the Meaning of Life

Discover

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

Statue of Nostradamus

Nostradamus and His Prophecies

airplane in flight (plane, aircraft, flying)

7 Puzzling Plane Disappearances

Normandy Invasion: Omaha Beach. World War II. D-Day. Infographic. SPOTLIGHT VERSION

Facts and Figures About the Landings on Omaha Beach During the Normandy Invasion on June 6, 1944

Tiger shark (Galeocerdo cuvieri).

14 Questions About Aquatic Animals Answered

Martin Luther King, Jr.

Why We Celebrate MLK Day

The Battle of Gettysburg, July 1-3, 1863. (Civil War, Pennsylvania)

9 Worst Generals in History

constant of aberration: Related Content

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Topics

sidereal period perturbation phase retrograde motion anomaly conjunction synodic period aphelion opposition Kepler’s laws of planetary motion

Key People

James Bradley, detail of an oil painting after Thomas Hudson, c. 1742-47; in the National Portrait Gallery, London

James Bradley

English astronomer