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Anderson > Stars > Flashcards

Stars Flashcards

1
Q

The name of our galaxy?

A

Milky Way

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2
Q

The offical shape of our galaxy?

A

Pinwheel

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3
Q

How many stars are in our galaxy?

A

400 billion

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4
Q

A big cloud of dust and gas?

A

Nebula

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5
Q

The beginning ingredient for everything?

A

Hydrogen

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6
Q

The result of a cloud of dust and gas being squeezed and compressed?

A

Heat

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7
Q

What shape do you get as a result?

A

Disk

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8
Q

The scientific name for a baby star?

A

Protostar

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9
Q

How can you tell it’s a baby star?

A

It glows

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10
Q

How hot is a baby star?

A

2 million

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11
Q

What is the scientific name for an adult star?

A

Main sequence star

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12
Q

How old is our sun

A

5 billion

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13
Q

How old is the earth

A

4.5 billion

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14
Q

What temperature must it reach?
(Main sequence)

A

18 million

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15
Q

What physical characteristic is going on? (Main sequence star)

A

Now using fusion

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16
Q

Why is it important our star is stable?

A

Can sustain life

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17
Q

Which stars are the biggest?

A

Blue

18
Q

Which type of stars are the smallest?

A

Red

19
Q

Which stars live the longest

A

Red

20
Q

Which stars are the hottest?

A

Blue

21
Q

Why do we see so few red stars?

A

Dimmer

22
Q

How old is the universe?

A

13.7 billion

23
Q

How long is the life expectancy for our sun?

A

10 billion

24
Q

What is the expected life span for the biggest blue stars?

A

1 million yrs

25
Q

What is the expected life span for the smallest red stars?

A

10 trillion yrs

26
Q

About what size are the smallest red stars compared to our sun?

A

10%

27
Q

How big are blue stars compared to our earth?

A

150x

28
Q

Which are the hottest stars?

A

Blue

29
Q

When a star stops collapsing it’s called a what?

A

White dwarf

30
Q

What stops the collapse of a star?

A

Electrons

31
Q

What is the size of a white dwarf

A

Earth

32
Q

How dense is it? (White Dwarf)

A

1 teaspoon weighs a car

33
Q

After the star has fused the helium what will happen to it?

A

Make heavier things

34
Q

What element will start to cause problems?

A

Iron

35
Q

What problem does this element cause?

A

Makes the star collapse

36
Q

A star exploding is scientifically called?

A

Supernova

37
Q

What will stop a star from collapsing?

A

Neutrons

38
Q

Where did they come from? (Neutrons in a star)

A

Squeezing electrons w/protons

39
Q

How dense is a neutron star?

A

1 teaspoon weighs Omaha

40
Q

Sometimes I can see the stars sometimes I can’t, this is called?

A

Polesar

41
Q

What causes this? (Polesar)

A

North and South Poles

Anderson (13 decks)

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