* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Formation of Stars - mcp
Rare Earth hypothesis wikipedia , lookup
Space Interferometry Mission wikipedia , lookup
Star of Bethlehem wikipedia , lookup
Constellation wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
Canis Minor wikipedia , lookup
Definition of planet wikipedia , lookup
Corona Borealis wikipedia , lookup
Corona Australis wikipedia , lookup
Auriga (constellation) wikipedia , lookup
Dyson sphere wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Observational astronomy wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Nebular hypothesis wikipedia , lookup
Cassiopeia (constellation) wikipedia , lookup
Perseus (constellation) wikipedia , lookup
Cygnus (constellation) wikipedia , lookup
Planetary habitability wikipedia , lookup
Planetary system wikipedia , lookup
Type II supernova wikipedia , lookup
Star catalogue wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
Stellar classification wikipedia , lookup
H II region wikipedia , lookup
Future of an expanding universe wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Timeline of astronomy wikipedia , lookup
Stellar kinematics wikipedia , lookup
Formation of Stars What is a star? 1. A sphere of hot, glowing gas. 2. Created inside of Nebulae 1. The Rosetta Nebula Nebulae – A cloud of gas and dust formed in space 3. Stars form when the dust starts to clump and have gravity 4. When the clump gets large enough and the heat within the mass reaches 10 million degrees K nuclear fusion begins 1) Nuclear Fusion – Small atoms, under tremendous pressure and temperature are able to form larger atoms and releases light and heat. How is a star different than a planet? 1. Planets form in a similar fashion to stars 2. Any object that has a mass that is less than 10% of our sun’s mass will not create enough heat to start nuclear fusion 3. Our sun is used to determine masses of stars ◦ 1.0 solar mass = mass of our sun ◦ If a stellar object is less than .01 solar mass it will not turn into a star Not all stars are created equal There are 7 different classes of stars 1. O – Hottest stars (30 – 60,000 K), typically blue in color and very large 2. B – Blue – white in color 3. A – White in color 4. F – Yellow-white color 5. G – Yellow in color, our sun is a G-class star (5-6000 K) 6. K – Yellow - Orange 7. M – Coolest stars (>3500 K) and are typically red and small Star Life Cycle 1. The life cycle of a star will vary based on it’s class 2. In general the larger and hotter the star the shorter the it’s life span 3. Our sun is a medium sized star and it will live for approximately 6 billion MORE years (for a total of 13 billion years) Stages of the Life Cycle 1. “Childhood of a Star” 1. Protostar – all stars go through this, and is the stage prior to nuclear fusion starting 2. “Adult stage of a star” 1. Main Sequence Stage – All stars experience this stage. 1. Longest stage for all stars 3. “Senior Citizen Stages of a Star” – These will vary depending on the size of the star. 1. Large Mass stars (Classes O, B, A and F) have more violent later life stages 2. Medium Mass stars (Classes G and K) are less violent 3. Small Mass stars (Class M) burn out quietly “Senior Citizen Stars” 1. Large Mass Stars 1. Super Red Giant Stage First stage of old age for large stars 1. Stars will more than double in size, will start to become cooler 2. Supernova Final stage of large stars 1. After Supernova star either becomes a blackhole OR a neutron star 2. Medium Mass Stars 1. Red Giant Stage Similar to Super Red Giants but not as extreme 2. White Dwarf Final stage of stars life, no fuel left for nuclear fusion to occur 3. Small Mass Stars 1. White Dwarf Never had enough fuel to become a Red Giant, moves directly to White Dwarf stage