Runs out of hydrogen to fuse - When do stars turn into Red Giants, Nuclear fusion starts - Why do protostars become Main sequence and start to shine, Only the very biggest ones - Which stars become black holes, Yes - Are you made of star dust?, Gravity and radiation pressure - Which two forces are balanced in a main sequence star?, Radiation pressure - Which force is reduced when the hydrogen runs out?, Gravity - Which force causes the stars to form in the first place?, High temperatures and pressure - What conditions are needed for fusion to occur?, Main Sequence - What stage of its life cycle is the Sun currently at?, Only in Supernovae - Where are large elements like Uranium made?, Iron - What is the largest atom that can be made in stars?, Helium - What does Hydrogen atoms fuse into?,

Life Cycle of Star Processes

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