orbits

"A book for young readers about space as explained through modeling activities"--Provided by publisher.

"A book detailing how planets move in their orbits"--Provided by publisher.

"Our modern understanding of the heliocentric universe developed five hundred years ago. Since the time of Copernicus and Galileo, scientists have made major strides in understanding how gravity, stars, and planets interact. 'Gravity, Orbiting Objects, and Planetary Motion' explains how early ideas have given way to sophisticated, proven theories about the universe. The book aligns with Next Generation Science Standards and also presents a look at what is next in the cutting-edge field of astronomy"--Amazon.com.

Presents the notes and a sound recording of the lecture given at Caltech in 1964 by renowned physicist Richard Feynman in which he developed a proof of the law of ellipses, accounting for the orbit of the planets, using elementary plane geometry.

Discusses comets, asteroids, and meteors, including how and where they are formed in space, what scientists are doing to study and track them, and what danger these doomsday rocks are to Earth.

Investigates the science of killer asteroids, one of which is believed to have crashed into Earth sixty-five million years ago, resulting in the extinction of the dinosaurs, and discusses the chances and implications of another such collision.