Space and the Sun

For today we will be researching different points about our solar system and the Universe.  Use the links below as we did last time.

1. Who was the first person to suggest that the Sun was in the middle of our Solar system? What did people think of this?
2. What is currently thought to have started the Universe?
3. Is the Universe getting bigger or smaller at the moment?
4. How is our Sun changing in size?
5. For the planet you were working on last lesson, find out how long it takes to orbit the sun (how mant days one year has).
6. How many other suns do Scientists think might exist? Why don't we know an exact number?

For question 1: http://info-poland.buffalo.edu/classroom/kopernik/copernicus.shtml
Question 2 and 3: http://science.nasa.gov/astrophysics/focus-areas/what-powered-the-big-bang/
Question 4: http://aspire.cosmic-ray.org/labs/star_life/starlife_main.html
Question 5: http://nssdc.gsfc.nasa.gov/planetary/factsheet/index.html
Question 6: http://www.esa.int/esaSC/SEM75BS1VED_index_0.html

Try these once you're finished - http://channel.nationalgeographic.com/channel/known-universe-interactive