History of science

10 dot points about astronomy 

1: we are in the milkyway which is amoung other millions of stars.

2: we spin around the sun and the moon spins around the earth.

3: the theory of that the earth was in the centre of the solar system came from the Greeks 

4: the Greeks made a working system made of cogs and brass that showed how the planets moved.

5: the new theory of the solar system was made up of irregular ellipses .

6: Galileo made a new telescope and made it better than the Dutch spyglass.

7: Galileo theory was accepted after his trial in Rome.

8: their much conflict between religon and science 

9. The belief system was spilt two the pagans and the Christians 

10: one astronomer used to read previous recording and calculations 72 times.

The expanding universe

The universe is constantly expanding. The universe consists of stars, planets, moons nebula, pulsars, black holes and space. Our solar system is approximately 5800 000 000 km from the sun to outside. Our solar system is small part of our galaxy, the Milky Way.

The universe is so large, it cannot be measured in kilometres. Instead we use light years. 1 light year = distance light will travel in one year.

Light travels  at 3000000km per second.

Evidence suggests that is still expanding. The edge of the universe is approx,  1400 million light years.

The stars and galaxies at the edge are moving faster than those in centre. 

Big Crunch- the Big Bang crunch is when dark energy reduces and gravity pulls everything onto it ending the universe .

Big chill- the world freezes over and ends life.