Guide to the Universe: Asteroids, Comets, and Dwarf Planets

This volume in the Greenwood Guides to the Universe series covers asteroids, comets, and dwarf planets—those small bodies that revolve the Sun—and provides readers with the most up-to-date understanding of the current state of scientific knowledge about them. Scientifically sound, but written with the student in mind, Asteroids, Comets, and Dwarf Planets is an excellent first step for researching the exciting scientific discoveries of the smallest celestial bodies in the solar system.

The Inner Solar System: The Sun, Mercury, Venus, Earth, and Mars

Ancient people around the globe once believed the Moon, Sun, planets, and stars were gods and goddesses, demons and angels revolving around Earth, the centre of their universe. Little did they know that Earth is a mere speck in a vast universe. It took many centuries for people to realize that Earth isn’t even the centre of our solar system. It is, however, one of the components of what’s known as the inner solar system— comprised of the Sun, four terrestrial planets, and the moons that orbit them...

Planets of Adventure

"Murray Leinster was not only a very good writer, he was a pioneer. . . . The wondrous thing about his work is that those great, trend-setting stories read as fresh and timely today as they did all those years ago."
In the first novel, "The Planet Explorer", the fate of the colonies scattered across the galaxy rests with one man, who races against the looming interstellar disaster. And in "The Forgotton Planet" a ship is marooned on a planet whose ecology has gone wild.

Fallen Angels

When a new technology-free government of the United States is elected to counteract the onset of the greenhouse effect, a devastating ice age results, and two hunted Space Hab astronauts become the planet's only hope for survival. Reissue.

1. The Planets Move (2000 B.C.– 500 B.C.)
A thousand years of observations reveal that there are stars that move in the sky and follow patterns, showing that the Earth is part of a solar system of planets separate from the fixed stars.

2. The Earth Moves (1543) Nicolaus Copernicus places the sun, not the Earth, at the center of the solar system.

3. Planetary Orbits Are Elliptical (1605 – 1609) Johannes Kepler devises mathematical laws that successfully and accurately predict the motions of the planets in elliptical orbits

Grade Level : 9 - 12