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comet

(Encyclopedia)CE5 Comet: Whatever the direction of a comet's flight, its “tail” always points away from the sun. The tail disappears when the comet is far from the sun. comet [Gr.,=longhaired], a small cele...

Cannon, Annie Jump

(Encyclopedia)Cannon, Annie Jump, 1863–1941, American astronomer, b. Dover, Del. In 1897 she became an assistant in the Harvard College Observatory, where (1911–38) she was astronomer and curator of astronomica...

False Cross

(Encyclopedia)False Cross, in astronomy: see Carina. ...

Xena

(Encyclopedia)Xena, in astronomy: see Eris.

encounter theory

(Encyclopedia)encounter theory, in astronomy, see solar system. ...

Dido

(Encyclopedia)Dido dīˈdō [key], in Roman mythology, queen of Carthage, also called Elissa. She was the daughter of a king of Tyre. After her brother Pygmalion murdered her husband, she fled to Libya, where she f...

population I and II

(Encyclopedia)population I and II, in astronomy: see stellar populations. ...

aether

(Encyclopedia)aether: see ether, in physics and astronomy. ...

Ultima Thule

(Encyclopedia)Ultima Thule, in astronomy and space exploration, nickname for Arrokoth. ...

cella

(Encyclopedia)cella sĕlˈə [key], the portion of a Roman temple that was enclosed within walls, as distinct from the open colonnaded porticoes that formed the rest of it. It corresponds to the naos in Greek templ...