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chromosphere

(Encyclopedia)chromosphere krōˈməsfērˌ [key] [Gr.,=color sphere], layer of rarefied, transparent gases in the solar atmosphere; it measures 6,000 mi (9,700 km) in thickness and lies between the photosphere (th...

Pickering, William Henry

(Encyclopedia)Pickering, William Henry, 1858–1938, American astronomer, b. Boston, grad. Massachusetts Institute of Technology (B.S., 1879). He taught at the Massachusetts Institute of Technology (1880–87) and ...

Shawnee Prophet

(Encyclopedia)Shawnee Prophet, 1775?–1837?, Native North American of the Shawnee tribe; brother of Tecumseh. His Native American name was Tenskwautawa. He announced himself as a prophet bearing a revelation from ...

Stonehenge

(Encyclopedia)Stonehenge stōnˈhĕnjˌ [key], group of standing stones on Salisbury Plain, Wiltshire, S England. Preeminent among megalithic monuments in the British Isles, it is similar to an older and larger mon...

Eddington, Sir Arthur Stanley

(Encyclopedia)Eddington, Sir Arthur Stanley, 1882–1944, British astronomer and physicist. He was chief assistant (1906–13) at the Royal Observatory, Greenwich, and was from 1913 Plumian professor of astronomy a...

moon

(Encyclopedia)CE5 The moon: Near side CE5 The moon: Far side moon, natural satellite of a planet (see satellite, natural) or dwarf planet, in particular, the single natural satellite of the earth. It is no...

saros

(Encyclopedia)saros: see eclipse.

Baily's beads

(Encyclopedia)Baily's beads: see eclipse.

umbra

(Encyclopedia)umbra: see eclipse; sunspots. ...

penumbra

(Encyclopedia)penumbra pĭnŭmˈbrə [key]: see eclipse; sunspots. ...