Question

Explain the steps of the life cycle of a star. Beginning with a nebula and ending with old age/death of a star, explain each step in a star’s life cycle. I give meldels

Answer 1

Please help me

Answer 2

I give medels

Answer 3

@iGreen

Answer 4

@Elijah_Southard14

Answer 5

well the death of a star is a supernova and in the spot where the star exploded forms a black hole

Answer 6

Ok

Answer 7

SOLAR MASS STAR --
Planetary nebula
Protostar
Main Sequence Star
Red Giant
White Dwarf

MASS 1.5 TIMES SUN --
Planetary nebula
Protostar
Main Sequence
Supernova
Neutron star

MASS 10 TIMES SUN --
Planetary nebula
Protostar
Main Sequence Red Giant
Supernova
Black hole

Answer 8

Stars are born in a region of high density Nebula, and condenses into a huge globule of gas and dust and contracts under its own gravity. A region of condensing matter will begin to heat up and start to glow forming Protostars. If a protostar contains enough matter the central temperature reaches 15 million degrees centigrade. At this temperature, nuclear reactions in which hydrogen fuses to form helium can start. The star begins to release energy, stopping it from contracting even more and causes it to shine. It is now a Main Sequence Star. A star of one solar mass remains in main sequence for about 10 billion years, until all of the hydrogen has fused to form helium. The helium core now starts to contract further and reactions begin to occur in a shell around the core. The core is hot enough for the helium to fuse to form carbon. The outer layers begin to expand, cool and shine less brightly. The expanding star is now called a Red Giant. The helium core runs out, and the outer layers drift of away from the core as a gaseous shell, this gas that surrounds the core is called a Planetary Nebula. The remaining core (thats 80% of the original star) is now in its final stages. The core becomes a White Dwarf the star eventually cools and dims. When it stops shining, the now dead star is called a Black Dwarf.

Answer 9

Is that the answer

Answer 10

this should help http://answers.yahoo.com/question/index?qid=20120608111757AAaGYGp

Answer 11

OK thank you

Answer 12

I have some more question

Answer 13

Which of the following can be thought of as opposites?

white dwarf and brown dwarf
black hole and protostar
neutron star and pulsar
red giant and blue giant

Answer 14

Are you there

Answer 15

@sammixboo

Answer 16

Can u help me

Answer 17

Please

Answer 18

I think it is b

Answer 19

It is :-) :-)