Mass, weight, and gravity
An object's weight depends on how much mass it has and the force of gravity that is being exerted on it. A person has more mass than a pencil, so if the person and the pencil are under the same pull of gravity then the person will weigh more, because the person has more mass to be pulled on by gravity. Take away gravity (out in the deep emptiness of space) and both would be weightless.
For a short YouTube clip on weight, mass, and gravity click here.
An object's weight depends on how much mass it has and the force of gravity that is being exerted on it. A person has more mass than a pencil, so if the person and the pencil are under the same pull of gravity then the person will weigh more, because the person has more mass to be pulled on by gravity. Take away gravity (out in the deep emptiness of space) and both would be weightless.
For a short YouTube clip on weight, mass, and gravity click here.
To go to the University of Nebraska-Lincoln astronomy animations page click here.
Meteors, Meteoroids, and Meteorites
Is that rock you found a meteorite? For info on how to find out, check out the discovery.com video clip by clicking here.
Is that rock you found a meteorite? For info on how to find out, check out the discovery.com video clip by clicking here.
Phases of the Moon
For a Phases of the Moon animation click here. You can click on each of the Moon phase labels to see what that phase looks like in the sky. You can also click run animation to watch the phases change continuously. As the animation plays, the timer will show you how many days are passing.
For a Phases of the Moon animation click here. You can click on each of the Moon phase labels to see what that phase looks like in the sky. You can also click run animation to watch the phases change continuously. As the animation plays, the timer will show you how many days are passing.
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Video & Music
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Moon videos
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For an animation showing how the Moon causes tides click here.
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Planets in Transit
For an animation of how we can detect extra-solar planets that are too far away to see, click here.
For an animation of how we can detect extra-solar planets that are too far away to see, click here.