Astronomy B ( fall 2015) Flashcards

(36 cards)

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?

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

25
Know the star groupings from smallest to largest
Know the star groupings from the smallest to largest
26
What do all of the inner planets have in common?
They are small and have rocky surfaces
27
How do reflecting telescopes differ from refracting telescopes?
They use a mirror instead of an objective lens
28
Besides Earth, which inner planet once had liquid water on its surface
Mars
29
What is distinctive about Jupiter?
It is the largest and most massive planet
30
Why are many large optical telescopes located on mountains?
to be above part of the atmosphere
31
Know the stages of the life cycle of the largest stars in order from first to last
Know the stages of the lifecycle if the largest stars in order from first to last
32
What process consumes the fuel of the sun?
Nuclear fusion
33
Large stars use up their hydrogen fuel_____
in a shorter time than a small star
34
The sun has enough hydrogen to last another____
5 billion years
35
What is the Kuiper Belt?
Comet debris orbiting past pluto
36
The Milk Way galaxy is an example of
a spiral galaxy