📌 Life Cycle of a Star ⭐

Question 1

1. how star forms

Answer 1

a star is formed from interstellar clouds of gas and dust that contain hydrogen

Question 2

2. protostar?

Answer 2

a protostar is an interstellar cloud collapsing and increasing in temperature as a result of its internal gravitational attraction

Question 3

3. main sequence

Answer 3

a protostar becomes a stable star when the inward force of gravitational attraction is balanced by an outward force due to the high temperature in the centre of the star

Question 4

4. run out of…

Answer 4

all stars eventually run out of hydrogen as fuel for the nuclear reaction

Question 5

5. EXPAND to form red giants

Answer 5

most stars expand to form red giants and more massive stars expand to form red supergiants when most of the hydrogen in the centre of the star has been converted to helium

Question 6

6. less massive star forms …

Answer 6

a red giant from a less massive star forms a planetary nebula with a white dwarf star at its centre

Question 7

7. red supergiant explodes…

Answer 7

a red supergiant explodes as a supernova, forming a nebula containing hydrogen and new heavier elements, leaving behind a neutron star or a black hole at its centre

Question 8

8. nebula from supernova forms?

Answer 8

the nebula from a supernova may form new stars with orbiting planets