Stars And Galaxies

star and galaxies

1. Nolan and Eric

2. A giant luminous ball of plasma held together
by gravity.

3. The first stage of a star is a nebula.
A nebula is where stars forms in a dusty
molecular clouds.

5. The next life stage of a star is a Proto star.
 A Proto star is the birth of a star.

6. The next stage of a star life stage is main
sequence star or a massive star.
A main sequence star is our typical sun.
A massive star is a star that is made out of
heavier gas
A massive star is about 50,000K
A regular star is around a few K.
K stands for Kelvin, a measurement of heat that
starts at Absolute zero.

7. After about 1-10billion years a main sequence
star will turn into a red giant.
And a massive star will turn into a red
supergiant.
They turn into these stars because they expand
when they exhaust their hydrogen and change
to helium.

8. When a star dies a red giant will turn into a
planetary nebula
And a red supergiant will turn in a supernova
which will explode.

9. After the stars die the planetary nebula will
turn into a white dwarf.
After a supernova explosion the star will either
become a neutron star or if the supernova
collapse it will become a black hole.
Then after a white dwarf there is a black dwarf
which is a dead sun.

11. 1.The star gets smaller or bigger in size
2. Nuclear fusion will turn the hydrogen turns
into helium
It will expand to become a red super giant
depending on what star it is.

12. At every center of a galaxy there is a super
massive mass black hole.
There is a spiral galaxies
There is an elliptical
There is an irregular
And there are morphologies

13. Spiral Galaxies consists of rotating disk of
stars.
They look like spirals.
They usually have a bright
bulge at the center.
The Milky way galaxy>>>

14. They have an elliptical shape.
There are a cluster of suns and planets that
makes up the elliptical shape.
M87 is below

15. They do not have a regular shape like the
elliptical and spiral galaxies.
Irregular galaxies were once spiral or elliptical
galaxies but were deformed by gravitational
action.

16. Morphologies galaxies have unusual formation

17. The difference between apparent magnitude
and absolute magnitude is that apparent
magnitude is a what a star looks from earth
and how bright it is and absolute is how bright
a star really is.

18. http://en.wikipedia.org/wiki/Star
http://www.classzone.com/books/earth_science/terc/content/visualizations/es2807/es2807page01.cfm
http://en.wikipedia.org/wiki/Protostar
http://scrapetv.com/News/News%20Pages/Science/pages/CERN-certain-Large-Hadron-Collider-will-not-destroy-planet-not-certain-about-France-Scrape-TV-The-World-on-your-side.html
http://www.windows.ucar.edu/tour/link=/sun/Solar_interior/Nuclear_Reactions/Fusion/Fusion_in_stars/star_life.html
http://en.wikipedia.org/wiki/Apparent_magnitude
Eric B.
http://en.wikipedia.org/wiki/Galaxy
abyss.uoregon.edu/~js/ast122/lectures/lec25.html
http://cas.sdss.org/dr6/en/proj/basic/galaxies/spirals.asp
http://www.daviddarling.info/encyclopedia/E/ellipgal.html
http://anneminard.com/wp/wp-content/uploads/2009/04/irregular-300x300.jpg
http://en.wikipedia.org/wiki/Galaxy#Other_morphologies
http://answers.yahoo.com/question/index?qid=20090103163817AAbd4nk