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Astronomy Final > Final > Flashcards

Final Flashcards

1
Q

How does earth rotate

A

West to East

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2
Q

How do stars rotate ?

A

East to west

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3
Q

The celestial sphere appears to?

A

Rotate around the earth once per day ( 24 hrs )

Due to earth rotation

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4
Q

Tycho Brahe’s contribution to astronomy included…

A

Collecting data that enabled Kepler to discover the laws of planetary motion

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5
Q

By newtons laws how does the the amount of force of gravity exerted on he larger asteroid a compare to the smaller

A

There the same mass

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6
Q

What has the highest temperature?

A

The metal filament that produces light in a regular white light bulb

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7
Q

What are the steps of the formation sequence for our solar system ?

A 
Collapse 
Porto star formation 
Condensation 
Accretion 
Wind clearing
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8
Q

What is the raisin cake model intended to explain about the expansion of the universe?

A

Every raisin in a raisin cake moves farther away from every other raisin: there is no special center raisin ( and no special central galaxy )

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9
Q

The star of Betelgeuse is about 425 light years away. If it explodes tonight in an extremely bright supernova explosion …

A

We won’t know about it until 425 years from now

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10
Q

Kepler 1 st law

A

The orbit of each planet is an eclipse with the sun at one focus

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11
Q

Kepler 2nd law

A

A planet moves in its orbit it sweeps out equal areas in equal times

Basically speed = distance/ time

S=D/T

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12
Q

Kepler 3rd law

A

Distant planets take more time to orbit
More distant planets orbit at slower average speeds

Basically

  1. The size and geometry of each planets orbital path
  2. The speed of each planet along its path at each time
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13
Q

Transits

A

When a planet passes between us and the sun like an eclipse

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14
Q

Prograde

A

Drift West to East

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15
Q

Retrograde

A

Moves the other way

East to West

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16
Q

What’s the cause of retrograde?

A

As the planets orbit the sun the outer planets move more slowly than the inner planets
( Keplers Law )

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17
Q

Galileo

A

Galileos telescope observations of planets and moons

18
Q

What is Issac Newton 1st law?

A

An object moves at constant velocity if there is no net force acting upon it

19
Q

What is newton 2nd law?

A

The acceleration of an object is that objects net force applied divided by the mass

Force= mass x acceleration

20
Q

What is newton 3rd law ?

A

For any force, there is always an equal and opposite reaction force

21
Q

Red light has the ______ wavelength and the ________ frequency and the _______ energy

A

Longest

Lowest

Lowest

22
Q

Violet has the ____ wavelength and the ______ frequency and ______ energy

A

Shortest

High

High

23
Q

Seasons are caused by….

A

Our axis

24
Q

What causes the seasons?

A

Seasons depend on how earths axis affects the directness of sunlight

25
Q

Perihelion

A

Point closest to the sun

26
Q

Aphellion

A

Point of orbit furthest from the sun

27
Q

The moon rises in the _____ and sets in the ____

A

East to West

28
Q

What describes why the moon goes through phases?

A

We only see part of the lit- up Moon depending on its position relative to the earth and sun

29
Q

As the earth passes mars in its orbit Mars appears to go …

A

BACKWARDS

30
Q

So if Polaris is at 34 degrees the angle of the stars is ……. degrees

A

56

31
Q

The moon and the earth cast ____ in sunlight when the sun, moon, and earth _____ , these shadows can cause _______

A

Shadows

Line up

Eclipses

32
Q

Solar eclipse

A

Sun Blocked

33
Q

Lunar eclipse

A

Moon in Earths’s shadow

-Eclipse

34
Q

Kinetic energy

A

Is of motion

35
Q

The list of layers of the sun correct order ?

A 
Core 
Radiation zone 
Convection zone 
Photosphere 
Chromosphere 
Corona
36
Q

What happens in the convention zone ?

A

Energy is transported outward by the rise of hot plasma and sinking of cooler plasma

37
Q

We determine the distance of a Cephid …?

A

Determing it’s luminosity from the period luminosity relation and then applying the inverse square law for light

38
Q

The main idea of the Big Bang theory ?

A

The idea that all matter and energy in the universe began in an unimaginably dense state and then space itself began expanding in all directions

39
Q

At the center of the sun fusion converts hydrogen into

A

Helium, energy, and neutrinos

40
Q

Solar energy leaves the core of the sun in form of

A

Photons

Astronomy Final (1 decks)

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