1st Law
The time it takes a comet to complete one revolution is called
(Orbital) period
A planet sweeps out in an equal area in equal time
True or False
True
Planets move at the same speed as they orbit the Sun.
True or False
False
Planets change speeds as they orbit the Sun
A regular oval shape
Ellipse
Kepler's 1st Law states that all planets orbit the sun in a shape called an?
Ellipse
The speed of the planets about the sun depends on...?
their distance from the sun
What does each variable in T^2=R^3 mean?
T=Obtical period
R= mean distance from the sun
A point used to define an ellipse
The moon is the focus
True or false
False
The sun is the focus
Kepler's second law states that equal areas are covered in equal amounts of time as an object orbits...?
the Sun
Unit used to describe distances in the solar system based on the Earth's distance to the Sun.
AU (astronomical unit)
The point in the orbit where a planet is farthest from the Sun
Aphelion
It takes Pluto a longer time to orbit the sun than the Earth does because...?
Goes much slower, has much further to go
Which of the following is correct?
A- Planets move slower when they are closer to the sun, faster when they are farther away.
B- Planets move faster when they are closer to the sun, slower when they are farther away.
B
Kepler's Third Law of Planetary Motion describes the relationship between the planet's...?
a- Time it takes to orbit the Sun and its distance from the Sun
b- Mass and distance from the Sun
A
The point in the orbit where a planet is closest to the Sun
Perihelion
Saturn's year is longer than Earth's because...?
Saturn is farther from the Sun/ its orbital period is longer.
Kepler's second law is about?
A vector joining any planet sweeps equal area in equal time
This is directly proportional to the square of the orbital period.
The cube of the orbital radius
As one variable increases, the other variable increases.
Directly proportional