Unit 6 Vocabulary

Apparent Magnitude: the magnitude of a star as it appears to an observer on the earth

Absolute Magnitude: the magnitude of a star as it would appear to a hypothetical observer at a distance of 10 parsecs or 32.6 light-years

Gravity: the force of attraction by which terrestrial bodies tend to fall toward the center of the earth

Rotate/Rotation: the movement or path of the earth or a heavenly body turning on its axis

Revolve/Revolution: to cause to move in a circular or curving course, as about a central point

Cycle: series of occurrences that repeats or is repeated