Rudolf Wolf

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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?

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

7 Notable Paintings in Switzerland

Discover

9 Mind-Altering Plants

Battle of the Alamo from "Texas: An Epitome of Texas History from the Filibustering and Revolutionary Eras to the Independence of the Republic, 1897. Texas Revolution, Texas revolt, Texas independence, Texas history.

6 Wars of Independence

Entrants falling and tumbling over while chasing the cheese at the 2016 'Cheese Rolling' held at Cooper's Hill, in the Cotswolds, Brockworth England

7 of the World’s Most Dangerous Festivals

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

Small, white rat (genus Rattus) on a glass table. (rodent, laboratory, experiment)

Cruel and Unusual Punishments: 15 Types of Torture

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

Illustration for Demystified "How Dangerous is Quicksand"

How Deadly Is Quicksand?

Rudolf Wolf: Facts & Related Content

Written and fact-checked by The Information Architects of Encyclopaedia Britannica

Facts

Also Known As	Johann Rudolf Wolf
Born	July 7, 1816 • Switzerland
Died	December 6, 1893 (aged 77) • Zürich • Switzerland
Subjects Of Study	Wolf’s sunspot number • sunspot cycle

Richard Christopher Carrington

British astronomer

Samuel Heinrich Schwabe

German astronomer

Didier Queloz

Swiss astronomer

Michel Mayor

Swiss astronomer

Fritz Zwicky

Swiss scientist

Robert Julius Trumpler

American astronomer

Fred L. Whipple

American astronomer

Alvan Graham Clark

American astronomer

Johannes Kepler

German astronomer

Nicolaus Copernicus

Polish astronomer

Galileo

Italian philosopher, astronomer and mathematician

Giordano Bruno

Italian philosopher

Six astronomers, after Gerard Hoet (1692)

Hipparchus

Greek astronomer

William Herschel

British-German astronomer

al-Bīrūnī

Persian scholar and scientist

Carl Friedrich Gauss

German mathematician

Henry Norris Russell

American astronomer

Ptolemy

Egyptian astronomer, mathematician, and geographer

Tycho Brahe

Danish astronomer

Edmond Halley

British scientist

Quiz

View of the Andromeda Galaxy (Messier 31, M31).

Astronomy and Space 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

Michael Faraday (L) English physicist and chemist (electromagnetism) and John Frederic Daniell (R) British chemist and meteorologist who invented the Daniell cell.

Faces of Science

Rudolf Wolf: Facts & Related Content

Facts

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