Module 5 - Astrophysics and Cosmology Flashcards
1
Q
Universe
A
everything that exists
2
Q
Planets
A
large objects that orbit a star
3
Q
Asteroids
A
chunks of rock and mineral that orbit the Sun
4
Q
Comets
A
balls of ice, dust and rock. orbit the sun about 1000 times further away than Pluto
5
Q
One astronomical unit
A
mean distance between the Earth and the Sun
6
Q
Parallax
A
When objects in the foreground seem to be moving faster than those further away
7
Q
Parsec
A
A star is exactly one parsec away if he angle of parallax = 1 arcsecond = 1/3600 degrees
