Astronomy B ( fall 2015) Flashcards

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1
Q

a supernova is the explosion of______

A

a nebula

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2
Q

A star is born when___

A

nuclear fusion starts

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3
Q

What creates sunspot storm on the sun

A

a change in temperature on the surface of the sun caused by strong magnetic fields

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4
Q

Where do baby atoms come from?

A

Helium through iron is formed in the cores of stars

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5
Q

What is located at the center of our galaxy?

A

A huge black hole

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6
Q

What fuels the sun?

A

Hydrogen

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7
Q

Where is the asteriod belt located

A

Between Mars and Jupiter

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8
Q

What are Oort Clouds

A

Distant comets 50,000 - 100.000 AU from the Sun

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9
Q

What is the Kuiper belt

A

Short period comets just beyond Neptune

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10
Q

How far back in time was the flash of light from the Big Bang?

A

13.8 billion years ago

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11
Q

What do the first four outer planets have in common?

A

They are much larger than the Earth and are made mainly of hydrogen and helium

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12
Q

Both reflecting and refracting telescopes are designed to

A

gather and focus visible light

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13
Q

What is the convective Zone

A

the layer of the sun that surrounds the radiative zone where energy moves as flowing cells of gas

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14
Q

What is the core?

A

extremely hot center of the sun where nuclear fusion takes place

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15
Q

What is Plasma?

A

High energy, high temperature form of matter; electrons are removed from atoms, leaving each atom with a positive electrical charge

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16
Q

What is the radioactive Zone?

A

The layer of the sum immediately surrounding the core; energy moves atom to atom

17
Q

The solar system formed from___

A

a giant cloud of gas and dust

18
Q

What is the name of our galaxy?

A

The MIlky Way

19
Q

What force assembled the Asteroid Belt?

A

The gravity of Jupiter

20
Q

What color are the coolest stars?

A

red

21
Q

Because of the Doppler Effect, Stars moving away from us are______

A

red shifted and measure more red than the true star

22
Q

How are Venus and Earth alike?

A

Their size and density

23
Q

Know the stages of the life cycle of the sun from first to last

A

Know the stages of the life cycle of the sun from first to last

24
Q

When a meteoroid enters Earth’s atmosphere it is called

A

a meteor

25
Q

Know the star groupings from smallest to largest

A

Know the star groupings from the smallest to largest

26
Q

What do all of the inner planets have in common?

A

They are small and have rocky surfaces

27
Q

How do reflecting telescopes differ from refracting telescopes?

A

They use a mirror instead of an objective lens

28
Q

Besides Earth, which inner planet once had liquid water on its surface

A

Mars

29
Q

What is distinctive about Jupiter?

A

It is the largest and most massive planet

30
Q

Why are many large optical telescopes located on mountains?

A

to be above part of the atmosphere

31
Q

Know the stages of the life cycle of the largest stars in order from first to last

A

Know the stages of the lifecycle if the largest stars in order from first to last

32
Q

What process consumes the fuel of the sun?

A

Nuclear fusion

33
Q

Large stars use up their hydrogen fuel_____

A

in a shorter time than a small star

34
Q

The sun has enough hydrogen to last another____

A

5 billion years

35
Q

What is the Kuiper Belt?

A

Comet debris orbiting past pluto

36
Q

The Milk Way galaxy is an example of

A

a spiral galaxy