Astronomers have contributed greatly to our understanding of physics and motion. In this section you can learn all about famous astronomers and what each of them has contributed to our understanding of space.

Lowell, Percival (1855-1916), a United States astronomer. In 1894 he established the Lowell Observatory at Flagstaff, Arizona.

Woolley, Richard (1906-1986) was the United Kingdom's astronomer royal from 1956 to 1971.

Burnham, Sherburne Wesley (1838-1921), a United States astronomer. His General Catalogue of Double Stars (1906) contains data on 13,665 double stars, more than a thousand of which he discovered.

Langley, Samuel Pierpont (1834-1906), a United States astronomer, physicist, and aviation pioneer.

Newcomb, Simon (1835-1909), a United States astronomer. He calculated the movements of the moon, Mercury, Venus, Mars, Uranus, and Neptune more precisely than had been achieved previously.

Airy, Sir George Biddell (1801-1892), a British astronomer. Airy was astronomer royal from 1835 to 1881.

Lockyer, Sir Joseph Norman (1836-1920), an English astronomer. He was one of the first to study the sun and stars with a spectroscope.

Von Kármán, Theodore (1881-1963) was a Hungarian-born American physicist and engineer who made great contributions to the field of aerodynamics and rocket technology.

Brahe, Tycho (15461601), a Danish astronomer. Tycho achieved fame by writing a book on the brilliant new star that appeared in 1572.

Leverrier, Urbain Jean Joseph (1811-1877), a French astronomer. Leverrier and John Couch Adams independently deduced the existence of the planet Neptune by mathematical calculations.

Slipher, Vesto Melvin (18751969), a United States astronomer. He made perhaps more basic contributions in various fields of astronomy than any of his contemporaries, Slipher is best known for his fundamental spectroscopic discoveries, especially of the rotations and atmospheres of planets.

Sitter, Willem de (18721934), a Dutch astronomer. He was a pioneer in applying Albert Einstein's theory of relativity to astronomy and developed a model of an expanding, curved universe.

Campbell, William Wallace (1862-1938), an American astronomer, made important measurements of the motion of stars.