Why does an apple fall to Earth?
Why does the International Space Station orbit Earth, instead of flying off out into the solar system?
Why do astronauts on board seem weightless?
In this video, how gravity explains the behavior of apples, astronauts, and kids on a trampoline!
How NASA uses gravity to send spacecraft on grand tours through the solar system...
And how the same laws of mass and motion devised by Newton allow a young American astronomer to demonstrate the existence of a black hole in the center of our home galaxy, the Milky Way.
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EDUCATORS-check out national and state STANDARDS you can target through the use of this video, the hands-on ACTIVITIES suggested to accompany it, and the RESOURCES to expand upon it. Also, check out VIDEO for background materials, already available, or coming soon.
STUDENTS-use RESOURCES to learn more, and check back soon for interactive learning games and materials.
PARENTS AND OTHERS: Home Schoolers are invited to follow EDUCATOR links, and all are invited to use RESOURCES to explore some of the most interesting, accurate and informative materials on the Web.
