Astronomy Flashcards
1
Q
Star formation
A
Nebula made of dust and gases. Materials pulled together by gravity. Hydrogen becomes hotter and spirals and glows. More mass attracted, gravitational pull stronger and star becomes pro star, pro star becomes hot and high pressure, to fuse hydrogen to become helium. Releases energy.
2
Q
Geocentric model vs heliocentric model
A
Geocentric:
Earth centred model
Heliocentric:
Sun centred model
