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Space & Earth Science 3rd Addition Chap 5 Vocab
Chapter 5 Vocabulary
Wanders or heavenly bodies that revolve around a star
is the shape of the orbit that planets travel around the sun on
When a planet is closest to the sun
When a planet is farthest away from the sun
The earths average distance from the sun is called one astronomical unit
the ratio of light reflected by a planet
a measure of the amount of matter the planet contain
heaviness of the mass... can change based on gravity
A planets size and mass together determine SG
of a planet is the amount and shape of the planets illuminated surface that is visible from the earth
a planet passes firectly between the earth and the sun so we see the silhouette against the suns bright disk