Scientific Explorer. Astronomy

Author: Gu Xueqiang Padilla
Publisher:
Publish Date: 2002-10-01
Features: "Science Explorer" - the authoritative research-based learning textbook in the U.S. Widely used comprehensive science textbook in U.S. middle schools. The best reference book for new curriculum standards, new concepts, and new learning methods. Full set of 15 volumes:
Movement, Force, and Energy;
Water on Earth;
Sound and Light;
Electricity and Magnetism;
Astronomy;
Chemical Reactions;
Composition of Matter;
Environmental Science;
From Bacteria to Plants;
Cells and Genetics;
Animals;
Human Physiology and Hygiene;
Earth's Interior;
Evolution of the Earth's Surface;
Weather and Climate.
Explore the mysteries of science, guide research-based learning, emphasize knowledge, skills, and methods, with hands-on, brain-stimulating, and fun learning. Original version by Zengxing Education Group, used in over 20 developed countries.
Jeanne Luce is observing celestial bodies beyond the outermost planets in the solar system. It is a ring composed of millions of icy debris orbiting the Sun. Luce and her collaborator David Jewitt first discovered these celestial bodies in 1992. The rocky Pluto is the largest object in this ring, which is called the Kuiper Belt. Pluto, along with approximately 3,000 other objects, travels through space together. Luce and Jewitt call these objects the "Pluto Group." In the Kuiper Belt, some celestial bodies escape and move closer to the Sun. The Sun's heat makes them glow and transform into comets.