Astrophysics Flashcards
1
Q
What is the universe?
A
A large collection of billions of galaxies
2
Q
What is a galaxy?
A
A large collection of billions of stars
3
Q
Which galaxy is the Solar System in?
A
Milky Way galaxy
4
Q
What is the relationship between orbital speed, orbital radius and time period?
A
v = (2 x π x r)/time period
5
Q
Do you understand that gravitational force causes:
- moons to orbit planets
- plants to orbit stars/the Sun
- artificial satellites to orbit the Earth
- comets to orbit the sun
A
6
Q
Do you understand that:
gravitational field strength (g) varies on different planets
A
