Astronomy

Altitude, Angular

Definition & Facts

Hertzsprung, Ejnar

Danish astronomer

Carr, Gerald

Biography & Facts

NGC Catalog

astronomical reference list

Adams, Walter

American astronomer

McKay, David S.

Biography & Facts

Ride, Sally

American astronaut

Halley’s Comet

astronomy

Carina

constellation

Dalton Minimum

solar phenomenon [1790–1830]

Tereshkova, Valentina

Biography, Vostok 6, & Facts

Deep Space 1

United States satellite

Galilean Transformations

physics

Cygnus Loop

astronomy

Krikalyov, Sergey Konstantinovich

Russian cosmonaut

Antikythera Mechanism

Purpose, & Facts