Astronomy Flashcards
1
Q
Astronomy
A
The study of universe and and everything in it
2
Q
Geocentric
A
The sun ,moon,planets and stars all orbit (move around)the earth ,which does not move
3
Q
Heliocentric
A
A theory of the structure of the solar system where the Sun is at the centre.
4
Q
Universe
A
A theory of the structure of the solar system where the Sun is at the centre.
5
Q
Big Bang
A
Most scientists believe that the universe began with an explosion - the Big Bang - about 14 billion years ago.
6
Q
Galaxy
A
A large group of stars, dust, gas and dark matter held together by gravity.
7
Q
Antimatter
A
The mirror image of matter. Every particle of matter has a corresponding particle of antimatter. When they meet they destroy each other and are converted into pure energy.
