P1 Flashcards
1
Q
What are Asteroids?
A
Irregular lumps of rock
2
Q
What are comets made of?
A
Rock and ice
3
Q
What is the Milky way?
A
A galaxy of stars which contains our sun
4
Q
What is the speed of light?
A
300,000 km/s
5
Q
What is the difference between real brightness and relative brightness?
A
Real brightness is the actual brightness, and relative is proportional to how far away the star is
6
Q
Why is it better to have telescopes in space?
A
There is a lot less light pollution, clearer image
7
Q
Which process happens inside the sun?
A
Nuclear fusion (the collision of hydrogen nuclei)
8
Q
What are chemical elements made in?
A
Stars