P8 - Space Physics Flashcards

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1
Q

What is a nebula

A

A cloud of dust and gas

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2
Q

What is a protostar

A

When the dust and gas (of a nebula) pull together due to gravity faster and faster which causes the temperature to rise

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3
Q

What’s the two forces acting on a star

A

Gravitational force and force due to fusion

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4
Q

When are the forces balanced in a star

A

When there is hydrogen available to fuse

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5
Q

What happens when hydrogen runs out of a main sequence star

A

A red giant is formed if the star is up to 8 solar masses
 A red supergiant is formed with very large main sequence stars

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6
Q

What happens when a red giant runs out of helium

A

A white dwarf is formed

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7
Q

What happens once a white dwarf has cooled down

A

A black dwarf is formed

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8
Q

When does the red supergiant turn into a supernova

A

When it has run out of nuclei to fuse

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9
Q

When does a supernova turn into a neutron star

A

When the store collapses which causes elements heavier than iron to form

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10
Q

When does the supernova turn into a black hole

A

When the supernova has a large Core 

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11
Q

What are the properties of a black hole 

A

A very strong gravitational field where even light cannot escape

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12
Q

What are the properties of a neutron star

A

Hot and dense

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13
Q

What is the life-cycle of a small star

A

Nebula —>protostar —> main sequence star —>red giant —>white dwarf —> black dwarf

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14
Q

What is life-cycle of a large main sequence star

A

Nebula —>Protostar —> main sequence star —> red supergiant —>supernova —> neutron star or black hole

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