Page 1: Front Page Page 2: Table of contents Page 3: Understanding Question 3 Page 4: Understanding Question 4 Page 5-11:1. Nebula & Main sequence2. Helium & Hydrogen Fusion3. Proto & Neutron Star4. Red & Super Giant5. Super Nova & Planetary Nebula6. Dwarfs7. Black Hole Page 12: Sources

Understand Question 1 How are stars

formed? Stars are made in

nebulas. When big stars die, they explode. This is called a supernova. When a supernova occurs in a nebula it causes the nebula to collapse forming stars .

Eagle Nebula

Understand Question 2 Why do low-mass & high-mass stars take

different paths at the end of life? Low-mass & high-mass stars take different

paths at the end of life because a low-mass star stops fusing and the outer layers of it gets driven away but the high-mass star collapses and creates a huge explosion.

< Planetary Nebula (Low Mass)

(High Mass)Super Nova>

Nebula and main sequence Nebula : A cloud in a galaxy containing dust,

gas ,and plasma. (Shown Above)

Main Sequence: A phase in which stars live out the majority of their lives. (Below)

Helium and Hydrogen Fusion Helium fusion: A kind of nuclear fusion,

with the nuclei involved being helium. (Look at Triple alpha process)

Hydrogen fusion: When four Hydrogen nuclei (protons) come together to make a Helium nucleus. (Right >)

Protostar: A protostar is a large object that forms by contraction out of gas in the interstellar medium.

Neutron Star: A super dense core of a star that’s left over after a Super Nova.

Protostar & Neutron Star

Protostar >

<Neutron Star

Red Giant: A small to medium main sequence star. When it runs out of hydrogen it starts fusing helium. (Right>)

Super Giant: A massive main sequence star. When it runs out of hydrogen. It starts fusing helium ,carbon ,oxygen, and etc. (Right>)

Super Nova: When a Red Supergiant stops its fusion. The star collapses and creates a huge explosion known as a supernova.

Super Nova>

Planetary Nebula : When a red giant completely stops fusing the outer

layers of the star has been driven away.

Super Nova & Planetary Nebula

BlackBlack Dwarf: A black dwarf is when the white dwarf cools off over millions of years until it no longer emits light. (Upper Right)

BrownBrown Dwarf: A protostar that is too small to create enough heat to start fusion

(Middle right)

WhiteWhite Dwarf: The left over of a star. It may be the size of the earth and the mass of the sun. (Bottom Right)

An object in the universe that has such a strong gravity, even light cant escape it.

SourcesName/Source/Page

Pictures:Nebula/Planetary Nebula:Picture:http://en.wikipedia.org/wiki/File:Eagle_nebula_pillars.jpg [Page 2]http://en.wikipedia.org/wiki/File:Omega_Nebula.jpg [Page 5]http://en.wikipedia.org/wiki/File:Keplers_supernova.jpg [Page 3/9]Super Nova:http://en.wikipedia.org/wiki/File:Keplers_supernova.jpg [Page 3]http://heasarc.gsfc.nasa.gov/docs/snr.html [Page 9]Black Hole:http://simple.wikipedia.org/wiki/Black_hole [Page 11]http://imagine.gsfc.nasa.gov/docs/science/know_l1/black_holes.html [Page 11]Star life cycle chart:http://aspire.cosmic-ray.org/labs/star_life/starlife_sequence.html [Page 5]http://library.thinkquest.org/C0110277/images/Starlifecycle_full.gif [Page 1]http://en.wikipedia.org/wiki/File:Sun_Life.png [Page 1]Hydrogen/Helium Fusion:http://www.windows.ucar.edu/sun/Solar_interior/Nuclear_Reactions/Fusion/Fusion_in_stars/pp_fusion.jpg [Page 6]http://en.wikipedia.org/wiki/File:Triple-Alpha_Process.png [Page 6]Protostar/Neutron Star:http://www.space-art.co.uk/pages-en/stars-I/Protostar.htm [Page 7]http://universe.nasa.gov/press/images/neutron/neutron_accretion.gif [Page 7]Red/Super Giant:http://www.astro.keele.ac.uk/workx/starlife/sun5_20.gif [Page 8]http://imgsrc.hubblesite.org/hu/db/images/hs-2005-02-f-web.jpg [Page 8]Black/Brown/White Dwarfs:http://www.dorlingkindersley-uk.co.uk/static/clipart/uk/dk/sci_space/image_sci_space013.jpg [Page 10]http://www.daviddarling.info/images/brown_dwarf_size.jpg [Page 10]http://en.wikipedia.org/wiki/File:Sirius_A_and_B_Hubble_photo.jpg [Page 10]

Information:http://simple.wikipedia.org/wiki/Starhttp://en.wikipedia.org/wiki/Helium_fusionhttp://simple.wikipedia.org/wiki/Black_holehttp://www.windows.ucar.edu/tour/link=/sun/Solar_interior/Nuclear_Reactions/Fusion/Fusion_in_stars/H_fusion.htmlhttp://en.wikipedia.org/wiki/Triple-alpha_process

[Notes]Lifecycle of a star NotesStar life cycle Notes