Stars

Front 1

Properties of Stars

Back 1

1. Luminosity

2. Mass

3. Radius

4. Temperature

5. Chemical composition

6. Evolutionary Stage

Front 2

Hydrostatic Equilibrium

Back 2

The balance between gravity and nuclear fusion in a star

Front 3

What happens when hydrostatic Equilibrium is disturbed?

Back 3

1. More gravity = more density = higher temperature

2. More nuclear fusion = lower temperature = star expands = red giant

Front 4

What determines a stars brightness?

Back 4

1. Size

2. Distance

3. Color

4. Temperature

Front 5

Apparent Magnitude

Back 5

How bright a star appears from the Earth.

Front 6

Absolute Magnitude

Back 6

How bright a star appears at a standard distance of 32.6 light years or 10 parsecs

Front 7

Spectral Type

Back 7

Classes measured by temperature. Our sun is type "G" (5,000-6,000K)

Front 8

What are the three types of Nebulae?

Back 8

1. Emission Nebulae

2. Reflection Nebulae

3. Dark Nebulae

Front 9

Emission Nebulae

Back 9

Ultraviolet Radiation. Appears pinkish.

Front 10

Reflection Nebulae

Back 10

Reflects bluish glow. Reflects light from other stars.

Front 11

Dark Nebulae

Back 11

So dense that light cannot pass through. Appears black.

Front 12

Evolution of Red Giant

Back 12

Stellar Nebula>red giant>planetary nebula>white dwarf

Front 13

Evolution of Red Super Giant

Back 13

Stellar nebula>red super giant>supernova>neutron star/black hole

Front 14

White dwarf

Back 14

A stellar remnant. Very dense, luminosity from stored thermal energy.

Front 15

Neutron Star

Back 15

Compact star resulting from gravitational collapse of a massive star after a supernova.

Front 16

Black Hole

Back 16

Place in space where the gravitational pull is so strong, not even light can escape from it.

Front 17

The higher the mass, the higher the _______.

Back 17

Gravity

Front 18

More mass means that there is more...

Back 18

1. Gravity

2. Fusion

3. Luminosity

Front 19

How do stars form?

Back 19

Shockwave approach a dark nebula

Front 20

Shockwaves come from...

Back 20

1. New star ignition

2. Supernova explosion

3. Galactic density wave

Front 21

Steps to star formation

Back 21

1. Shockwave approaches nebula

2. Shockwave passes through nebula

3. Dense regions of the nebula collapse

4. Proto stars begin to form

Front 22

Evolution of a stars with low mass

Back 22

Has too little matter, gravity is too weak to collapse into fusion stage, object stops evolution and turns into Brown dwarf, cools to black dwarf

Front 23

Low mass star evolution

Back 23

1. Collapse to fusion temperature in core

2. Red dwarf

3. Live the longest

4. Fusion stops when H turns to He.

5. Goes through SCH

6. Remnants become a white dwarf