Astronomical Dictionary on Letter #H

Heliocentric

Sun-centered. Positions of planets, including the Earth and Moon, referred to the center of the Sun...

Hadley

John Hadley (1682-1744) English mathematician and inventor. Built first serviceable reflecting teles...

Halley

Edmond Halley (1656-1742) English astronomer. In 1758, predicted accurately the return of a comet pr...

Herschel

Sir William Herschel (1738-1822). British astronomer. Built reflecting telescope of superior quality...

Hestia

In Greek mythology, one of the twelve Olympian gods. Sister of Zeus and goddess of the hearth and ho...

Hubble

Edwin Powell Hubble (1889-1953) American astronomer known for seminal work in modern cosmology....

Hummocky

Uneven; describing a terrain abounding in irregular knolls, mounds, or other small elevations....

Hyperion

In Greek mythology, a Titan, son of Uranus and Gaea. Husband of Theia and father of Eos (the Dawn). ...