Lecture tutorials
Over what range of distances from the sun would you expect to find only solid, Rocky material collecting together to form a terrestrial planet?
0.2 - 2.0 AUs
How far from the central star does a planet orbit if it has an orbital period of one year
1 AU
How many moons would fit across the diameter of the sun?
440
Which of the following pairs would make a good scale model of earth and the moon?
A basketball and a baseball
What items can represent the scale of the earth/suns diameter
Basketball and pea
Which planets formed at temperatures cooler than the freezing point of water?
Jupiter, Saturn, Uranus, Neptune
When the spacecraft is at the halfway point between earth and mars, how does the strength of the gravitational force on the spaceprobe by earth compare with the strength of the force by mars?
It will experience a stronger force by earth because earth is more massive.
How would the strength of the force between the Moon and Earth change if the mass of the Moon were somehow made of two times greater than its actual mass?
It would double
As a planets orbital distance from the sun increases
It's orbital period also increases
If a planets distance from a central star is doubled than
It's orbital period will more than double
Eccentricity close to 1
Orbit is very flat
Eccentricity close to 0
Orbit is very round, almost a perfect circle
If you have two stars and one of them is closer to the sun, which would orbit the central star faster?
The closer star because the central stars gravity affects it more
Given that earth is larger and more massive than the moon, how does the strength of the gravitational force that the moon exerts in earth compare to the gravitational force that earth exerts on the moon?
The forces are equal but opposite
How would the speed change of a planet with a perfectly circular orbit?
The speed would stay the same
Would your weight be more, less or the same on mars as it is on earth?
You would weigh less on mars
over what range of distances from the sun would you expect to find light gases, such as hydrogen and helium, collecting to form a jovian planet?
greater than 2 au
Which planet is an example of why mass does not play a role?
Mars-it is 2nd smallest planet, is pretty far from the sun and has an orbital period slightly longer than earths
At which position does a planet travel its fastest? Slowest?
Fastest when it is closest to the sun and slowest when it is farthest from the shb
A planets mass does not affect
The orbital period of a planet
How many times could the moons orbital diameter fit between earth and the sun
220
How many earths could you fit between the earth and the sun
110
Relationship between a planets orbital speed and companion star
A planets orbital speed is faster when it is closer to its companion star
How many earths could you fit between earth and the moon?
About 30 earths
How does earths orbital speed change throughout the year?
Earths orbital speed changes very little throughout the year
Which planets formed at temperatures hotter than the boiling point of water?
Mercury, Venus, Earth, Mars
Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first.
Newton's third law of motion
Does the mass of a planet play a role in the speed it orbits a central star?
No only it's distance from the central star plays a role
If a planet has a perfectly circular orbit and the distance it travels is the same each month, does it obey keplers 2nd law?
Yes becuase the orbit is a perfect circle so the distance around the orbit is the same each month