Search results
Asaph Hall III (October 15, 1829 – November 22, 1907) was an American astronomer who is best known for having discovered the two moons of Mars, Deimos and Phobos, in 1877. [1] He determined the orbits of satellites of other planets and of double stars, the rotation of Saturn, and the mass of Mars.
Mars is less dense than Earth, having about 15% of Earth's volume and 11% of Earth's mass, resulting in about 38% of Earth's surface gravity. Mars is the only presently known example of a desert planet, a rocky planet with a surface akin to that of Earth's hot deserts.
May 21, 2018 · The American astronomer Asaph Hall (1829-1907) discovered the two satellites of the planet Mars and was an important figure in government scientific circles during the period following the Civil War. Asaph Hall was born in Goshen, Conn.
simple.wikipedia.org · wiki · Asaph_HallAsaph Hall - Simple English Wikipedia, the free encyclopedia
Asaph Hall. Asaph Hall III (October 15, 1829 – November 22, 1907) was an American astronomer. He is best known for having discovered the two moons of Mars, Deimos and Phobos, in 1877. [1] He found the orbits of satellites of other planets and of double stars.
The first inauguration of Andrew Jackson as the seventh president of the United States was held on Wednesday, March 4, 1829, at the United States Capitol in Washington, D.C. The inauguration marked the commencement of the first four-year term of Andrew Jackson as president and the second term of John C. Calhoun as vice president.
The existence of Mars as a wandering object in the night sky was recorded by ancient Egyptian astronomers. By the 2nd millennium BCE they were familiar with the apparent retrograde motion of the planet, in which it appears to move in the opposite direction across the sky from its normal progression. [2] .
The geological history of Mars follows the physical evolution of Mars as substantiated by observations, indirect and direct measurements, and various inference techniques.
