Nebula
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NEBULA!. A nebula is a cloud of gas and dust. Stars are formed in a nebula. The size of a nebula varies depending on the size of the original cloud of dust. http://nssdc.gsfc.nasa.gov/image/astro/hst_pillars_m16.jpg. Protostar !.

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Nebula

NEBULA!

A nebula is a cloud of gas and dust. Stars are formed in a nebula. The size of a nebula varies depending on the size of the original cloud of dust.

http://nssdc.gsfc.nasa.gov/image/astro/hst_pillars_m16.jpg


Protostar

Protostar!

A protostar is baby star. A protostar lasts about 100,000 years. A protostar is a early phase in the process of star formation. The arrow above is pointing to a protostar.


Brown dwarf

BROWN DWARF!

A brown dwarf is a sub-stellar object. It’s too small to create enough heat to start fusion. It is thirteen times the mass of Jupiter.

http://en.wikipedia.org/wiki/File:Brown_Dwarf_Gliese_229B.jpg


Main sequence

MAIN SEQUENCE!

Main sequence is the process when the protostar gains enough mass to begin fusion. All the main sequence stars fuse hydrogen. Duration that a star spends in main sequence depends on the amount of fuel it has to fuse and the rate at which it fuses that fuel.

This is a example of a Main sequence star to the right.

http://outreach.atnf.csiro.au/education/senior/astrophysics/stellarevolution_mainsequence.html


Hydrogen fusion

HYDROGEN FUSION!

In the basic Hydrogen fusion cycle, four Hydrogen nuclei (protons) come together to make a Helium nucleus. The important thing to remember is that the fusion cycle releases energy In the core of the star. This is the energy that we feel on a hot summer day.

http://www.windows.ucar.edu/tour/link=/sun/Solar_interior/Nuclear_Reactions/Fusion/Fusion_in_stars/pp_fusion_jpg_image.html


Red giants

RED GIANTS!

Small to medium main sequence star runs out of hydrogen and begins fusing helium. A red giant is a luminous giant star of low or intermediate mass (roughly 0.5–10 solar masses) that is in a late phase of stellar evolution.

http://media.photobucket.com/image/super%20giant/sweetd_014/Lightechoesfromsupergiantstar.jpg?o=43


Heliuim fusion

HELIUIM FUSION!

Helium fusion is the kind of nuclear fusion with nuclei involved being in helium. In the triple alpha process two helium nuclei produces beryllium, which is unstable and brakes back down to two helium nuclei with the half life of one times 10 to the power of -16 to 2.6 times ten to the -16th power seconds.

http://www.webelements.com/helium/pictures.html


Planetary nebula

PLANETARY NEBULA!

A planetary nebula is an emission nebula consisting of a glowing shell of gas and plasma. Planetary nebula are important objects in astronomy because they play a critical role in the chemical evolution of a galaxy.

http://en.wikipedia.org/wiki/File:NGC6543.jpg


White dwarf

WHITE DWARF!

A white dwarf is a leftover core of the star. It may only be the size of earth, But it has a mass equal to half of the sun. It is 0.6 solar mass, For a regular star is only 1 solar mass.

http://en.wikipedia.org/wiki/File:Sirius_A_and_B_Hubble_photo.jpg


Black dwarf

BLACK DWARF!

A black dwarf cools off over trillions of years until it no longer emits hear or light. There is no black dwarfs in the universe because our universe is only 13.7 billion years old.


High mass stars

HIGH MASS STARS!


Nebula1

NEBULA!

A nebula is a cloud of gas and dust. Stars are formed in a nebula. The size of a nebula varies depending on the size of the original cloud of dust.


Protostar1

PROTOSTAR!

A protostar is baby star. A protostar lasts about 100,000 years. A protostar is a early phase in the process of star formation. The arrow above is pointing to a protostar.


Massive main sequence star

MASSIVE MAIN SEQUENCE STAR!

Stars fuse hydrogen much faster than small or medium stars. It is the same as a main sequence star it just dies a lot faster.


Red supergiant

RED SUPERGIANT!

Red supergiants are massive main sequence stars that run out of hydrogen and begin fusing helium carbon oxygen etc. Stars with ten solar masses turn into red superginats.

http://hubblesite.org/gallery/album/entire/pr2005002f/


Supernova

SUPERNOVA!

A supernova is when fusion stops and the star collapses and creates a huge explosion. In a short period of time when a supernova blows up it can radiate as much energy as the sun could emit over it’s life span.

http://en.wikipedia.org/wiki/Supernova


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