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AST Module 1 Planetary Motion Flashcards | StudBud
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AST Module 1 Planetary Motion
AST Module 1 Planetary Motion
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1
The geocentric model of the universe stated that
Earth revolved around the celestial sphere
Earth was a “wanderer
the sun was the center of the universe
Earth was the center of the universe
2
Elliptical planetary motion is
Force of gravity equally the Centripetal Force
Only applies to Earth
Force of Gravity only
Centripetal Force equallying Centrifugal Force
3
What is free fall?
Experiencing no gravitational force
Falling faster than the speed of light
Falling at the accleration of gravity
Only happens in space
4
What is the relationship between focal distance and eccentricity?
As focal distance increases the orbit becomes more circular
As focal point does not change; all orbits are perfect circles
As focal distance increases, eccentricity decreases
As focal distance increases, eccentricity increases
5
What did Copernicus do?
Created the theory of gravity.
Created copper.
Created a model of the Geocentric theory.
Created a model of the Heliocentrism theory.
6
What is retrograde motion of the planets?
They appear to move backwards in the sky
They appear to move up and down
They have psychedelic colors at certain times of the year
They appear from the 70's
7
What did Newton say gravity was?
an apple
acceleration we feel through space
force of attraction between any two masses
curvature of spacetime around a massive object
8
The Copernican model indicated that the geocentric model of Ptolemy that had prevailed for centuries was incorrect.
True
False
9
How many laws does Kepler have
Three
One thousand
Thirty
Sixteen
10
What is retrograde motion of the planets?
Motion of a planets relative to a black hole
They appear to move backwards in the sky
23 sols
Motion of galaxies around a black hole
11
What are the consequences of Kepler's 2nd law?
Planets further from the sun take longer to complete an orbit
Retrograde motion is explained
Planets move faster when closer to the Sun
Comets interfere with planet orbits
12
Tangential velocity is __ to the F
c
90°
180°
15°
45°
13
What is astrology?
The study of stars effects on people
The study of stars
The study of earth
The study of space
14
The earth has a greater gravitational pull than the moon because
the moon is too far away
there is greater friction on the moon
the earth has more mass
the moon has no atmosphere and therefore no air
15
The best way to explain weightlessness is the:
absence of gravity
absence of mass
absence of forward motion
absence of support force
16
On the moon, you would weigh _____ of your current weight.
1/15th
1/2
1/8th
1/6th
17
Which planet has the greatest orbital velocity?
Venus
Jupiter
Neptune
Mercury
18
What is the name of your instructor for Astronomy Lecture?
Dr. Rogers
Dr. Garber
Dr. Garrity
Dr. Gasson
19
What was Nicolaus Copernicus taught to do?
Question astronomy beliefs
Question Einstein's Theory of Relativity
Question Kepler's Law of Planetary Motion
Question Newton's Law of Gravity
20
Satellite motion follows which law(s)?
Newton's law of gravity
All these laws
Enistein's theory of gravity
Kepler's laws of motion
21
Astrology and Astronomy are the same thing
False
True
22
Forward motion and free-fall motion combine to cause __________.
Acceleration
Orbiting
Nothing
A black hole to form
23
What force causes planets to make an orbital motion?
smart people
gravitational forces
centrifugal
free will
24
What is the acceleration during free fall close to earth?
9.8 m/s2
20 m/s2
no accleration
0.001 m/s2
25
How did Kepler say planets orbited the sun?
Ellipses
Circles
Very carefully!
Squares
26
What is Astronomy?
The branch of science that studies culture of stars.
The branch of science that studies only the Milky Way.
The branch of science that studies only stars and planets that can be seen.
A branch of science that studies zodiac signs.
27
The second law of planetary motion shows
a star is at the center of a solar system
planets do not orbit at a constant speed
planets move at a constant speed
planets move in circular orbits
28
Who used the first telescope?
Charles II
Francis Bacon
Galileo
John Locke
29
What is gravity?
A force that pulls objects toward each other
Gravitational pull of the Sun on all objects
The measure of the amount of matter in an object is its weight
When the only force acting on an object is gravity
30
Why does each planet in the solar system orbit around the sun?
the planets' attraction to one another
asteroid belt
solar winds
the sun's powerful gravity
31
Planets are believed to form....
before the galaxy
after the stars they orbit.
only around stars just like the Sun.
millions of years after the stars they orbit.
32
Who developed the laws of planetary motion?
Newton
Copernicus
Kepler
Galileo
33
Imagine that there was no gravity. What would happen to your computer on your desk?
It would float up off the desk.
You would not be able to get it off the desk.
It would fall to the floor.
Nothing
34
Ptolemy's Geocentric Model is no longer accepted because
Kepler showed that the Heliocentric model was more accurate
Tycho Brahe's bladder exploded and so did Ptolemy's model
the church said that it was no longer correct
it died along with Ptolemy
35
What would happen if there were no gravity on earth?
Objects would be heavy.
Objects would all have the same weight.
Earth and objects on Earth would crash into the Sun
Objects on earth would slowly float into space.
36
What would happen to the moon if there was NO gravity?
inertia would cause the moon to fly into space
force would keep the moon at the same distance from Earth
the moon would crash into the Earth
inertia would keep the moon in its orbit
37
What is an orbit?
Defies Physics
One complete circle around the sun
Describes a smaller object revolving around a larger object
A circular spin the object has on a circular reference point
38
What is the best description of a hypothesis?
an educated guess
a finding
a theory that went wrong
results
39
The path of the planets about the sun is elliptical in shape
Kepler's Second Law
Kepler's Third Law
All three laws
Kepler's First Law
40
An object in free fall
undergoes a velocity decrease
experiences no gravity
has an acceleration with a magnitude of 9.8 m/s2 near Earth
only in space
