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stellar evolution & layers of the Sun - Astronomy

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Term
Definition
Emission Nebula   Large clouds of gas and dust. Rich in hydrogen. Stars are born here  
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Protostar   Large cloud of gas and dust that is contracting due to gravity. Could ignite to form a star.  
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Nuclear fusion   The combining of atoms in the core of a star to create heavier atoms.  
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Hydrostatic equilibrium   The balance of forces in a star. Gravity pulling in and nuclear fusion pushing out.  
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Main sequence   Most stars live here for most of their life as they fuse Hydrogen atoms into helium atoms.  
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Giant   Stage of stellar evolution when hydrostatic equilibrium becomes unbalanced and a main sequence star goes.  
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Dwarf   Low mass,low luminosity, small star  
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Supernova   Extremely massive stars explode  
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Neutron star   Born from a supernova, small core (size of city) has so much gravity that protons and electron and crushed into neutrons.  
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Black hole   Born from supernova. Core of a massive star collapse upon itself. Matter and light are pulled into a tiny space due to gravity.  
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Planetary Nebula   Small dying stars shed their outer layers, leaving their core behind.  
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Created by: Langerphysics
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