Answers to life of a star questions
1. Gravity is a force that pulls objects toward each other.
1- dust and gases swirl around, breaking into clumps and contracting because of gravitational forces.
2-as clumps bump into each other they get bigger, gravity gets stronger, able to attract more particles and pack tightly together
3-eventually they clumps are dense and hot enough for nuclear fusion
New star formed
3. When stars run out of fuel red stars occur followed by supernovas or white dwarf stars.
4. A supernova is an enormous explosion. Core collapses inward to become either a neutron star or black hole.
5. Neutron star is an extremely dense star composed of neutrons, neutrons are so tightly packed with no space between them that a cupful of neutron star would have
a mass of millions of kilograms.
6. Pulsar is one type of neutron star , they emit pulses of very high energy radio waves. They are very small, very dense, about same mass as normal star, rotate like a lighthouse.
7. Extremely large stars can turn into black holes.
8. Black hole is a small, very dense object with a force of gravity so strong that nothing can escape from it, not even light can be radiated away from its surface.
9. Low mass mass 10 times sun
-small/med nebula -large nebula
-gradually become hot dense clump - short time becomes hot dense clump
-nuclear fusion for 10 billion years - nuclear fusion only few million years
-swell into large, cool red giant - swells to become red supergiant
- becomes small, hot, dense white dwarf star -core collapses, supernova occurs
-white star eventually cools & fades - core packs as neutron star, gases drift
off as nebula to be recycled
10. Red giant - in old age stars become larger and red (stars size of sun)
Red supergiant- large stars become larger and red (stars10 times size of sun)
White dwarf - shrinking star core, is considered small star with a higher temp than red or yellow star