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Asaph Hall and the Discovery of Phobos and Deimos

Asaph Hall and the Discovery of Phobos and Deimos

Tabea Tietz
On October 15, 1829, American astronomer Asaph Hall III was born, who is most famous for having discovered the moons of Mars, Deimos and Phobos, in 1877. He determined the orbits of satellites of other planets and of double stars, the rotation of Saturn, and the mass of Mars. “The deepest truths require still deeper truths to explain them.” – Asaph Hall Asaph Hall – Early Years Asaph Hall was born in…
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astronomy
Voyager and the Exploration of Saturn

Voyager and the Exploration of Saturn

Harald Sack
On August 25, 1981, American space probe Voyager 2 passed Saturn and transmitted stunning pictures of the ring planet. The space probe had been launched by NASA on August 20, 1977 to study the outer Solar System and eventually to push forward into interstellar space. Until today, operating for more than 30 years the spacecraft still receives routine commands and transmits data back to the Deep Space Network, a world-wide network of large…
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astronomy
Giovanni Domenico Cassini and the Moons of Saturn

Giovanni Domenico Cassini and the Moons of Saturn

Harald Sack
On December 23, 1672, Italian astronomer Giovanni Domenico Cassini discovered Rhea, the 2nd largest of the 62 Saturn moons that are known by today. Background and Education Giovanni Cassini Cassini was born in Perinaldo (Liguria) on June 8, 1625. He married the rich Geneviève de Laistre, became a French citizen in 1673 and began to write his first name Jean-Dominique. Cassini studied at the Jesuit College in Genoa and Bologna. Through the…
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physics
James van Allen and the Weather in Space

James van Allen and the Weather in Space

Tabea Tietz
On September 7, 1914, astrophysicist and space pioneer Dr. James Van Allen was born. The Van Allen radiation belts were named after him, following the 1958 satellite missions (Explorer 1 and Explorer 3) in which Van Allen had argued that a Geiger counter should be used to detect charged particles. “Apparently, something happens on the sun. It sends out a burst of gases. The reservoirs above our earth shake like a bowl…
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astronomy
To Boldly Go Where No Man Has Gone Before – Voyager 2

To Boldly Go Where No Man Has Gone Before – Voyager 2

Harald Sack
On July 9, 1979 the interplanetary spacecraft Voyager 2 passed Jupiter, the largest planet in the Solar System. The space probe had been launched by NASA on August 20, 1977 to study the outer Solar System and eventually to push forward into interstellar space. Until today,  operating for more than 30 years the spacecraft still receives routine commands and transmits data back to the Deep Space Network, a world-wide network of large antennas…
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astronomy
Christiaan Huygens and the Discovery of Saturn Moon Titan

Christiaan Huygens and the Discovery of Saturn Moon Titan

Tabea Tietz
On March 25, 1655, Saturn‘s largest moon Titan was discovered by astronomer and physicist Christiaan Huygens. Titan is considered as the most Earth-like moon discovered so far and the second largest in the solar system. Christian Huygens’ Background Christiaan Huygens was born into an influential family and provided with a decent education all his life, leaning several foreign languages mathematics, logic, and rhetorics. His father was friends with Galileo Galilei and René…
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astronomy
James Edward Keeler and the Rings of Saturn

James Edward Keeler and the Rings of Saturn

Harald Sack
On September 10, 1857, American astronomer James Edward Keeler was born. Keeler is best known for being the astronomer who confirmed James Clerk Maxwell‘s theory that the rings of Saturn were not solid (requiring uniform rotation), but composed of meteoric particles.[3] James Edward Keeler – Early Years James Edward Keeler was born in La Salle, Illinois, to William F. Keeler, who served as a paymaster in the U.S. Navy at the time…
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