Seth Carlo Chandler, Jr. (September 16 1846 – December 31 1913) was an American astronomer.

He was born in Boston, Massachusetts. During his last year in high school he performed mathematical computations for Benjamin Peirce, of the Harvard College Observatory.

After graduating, he became the assistant of Benjamin A. Gould. Gould was director of the Longitude Department of the U.S. Coast Survey program, a geodetic survey program. When Gould left to become director of the national observatory in Argentina, Chandler also left and became an actuary. However, he continued to work in astronomy as an amateur affiliated with Harvard College Observatory.

Chandler is best remembered for his research on what is today known as the Chandler wobble. His research on this spanned nearly three decades.

Chandler also made contributions to other areas of astronomy, including variable stars. He independently co-discovered the nova T Coronae Borealis , improved the estimate of the constant of aberration, and computed the orbital parameters of asteroids and comets.

Chandler was awarded the Gold Medal of the Royal Astronomical Society in 1896 and the James Craig Watson Medal in 1894.

An 85m crater on the Moon is named after him (see link).

Reference

• "Latitude, How American Astronomers Solved the Mystery of Variation" by Bill Carter and Merri Sue Carter, Naval Institute Press, Annapolis, MD., 2002.

External link

• Biography (National Academy of Sciences)
• Craters on the Moon