Neptune's natural satellites -- Neptune has 13 known moons. The largest by far is Triton, discovered by William Lassell just 17 days after the discovery of Neptune itself. It took a hundred years to discover the second, Nereid. ... > full article

Dysnomia (moon of Eris) -- Dysnomia, is a moon of the dwarf planet Eris. The satellite is about 60 times fainter than Eris, and its diameter is estimated to be approximately eight times smaller. Astronomers now know that three ... > full article

Charon (moon) -- Charon, discovered in 1978, is, depending on the definition employed, either the largest moon of Pluto or one member of a double dwarf planet with Pluto being the other member. With the discovery in ... > full article

Uranus' natural satellites -- Uranus has 27 known moons. The first two moons (Titania and Oberon) were discovered by William Herschel on March 13, 1787. Two more moons (Ariel and Umbriel) were discovered by William Lassell in ... > full article

Definition of planet -- The definition of "planet" has for some time been the subject of intense debate. Although the word dates back thousands of years, no officially decreed scientific definition of "planet" existed ... > full article

Pluto -- Pluto, designated (134340) Pluto, in the Minor Planet Center catalogue, is the second-largest known dwarf planet in the solar system. It orbits between 29 and 49 AUえーゆー from the Sun, and was the first ... > full article

Asteroid belt -- The asteroid belt is a region of the solar system falling roughly between the planets Mars and Jupiter where the greatest concentration of asteroid orbits can be found. Despite popular imagery, the ... > full article

Jupiter's moons -- Jupiter has 63 known natural satellites. Although claims are made for the observation of one of Jupiter's moons by Chinese astronomer Gan De in 364 BC, the first certain observations of Jupiter's ... > full article

Eclipse -- An eclipse is an astronomical event that occurs when one celestial object moves into the shadow of another. The term is most often used to describe either a solar eclipse, when the Moon's shadow ... > full article

Eris (dwarf planet) -- Eris is the largest known dwarf planet in the solar system. It is a trans-Neptunian object (TNO), orbiting the Sun in a region of space known as the scattered disc, just beyond the Kuiper belt, and ... > full article

Atlas of the Moon
The definitive Moon atlas is back! Revised, updated, and improved with expanded text and maps, this venerable atlas is the ideal reference guide for beginning Moon-gazers and expert lunar observers ... > read more

Roving Mars : Spirit, Opportunity, and the Exploration of the Red Planet
teve Squyres is the face and voice of NASA's Mars Exploration Rover mission. Squyres dreamed up the mission in 1987, saw it through from conception in 1995 to a successful landing in 2004, and serves ... > read more

Tactics of the Crescent Moon: Militant Muslim Combat Methods
Tactics of the Crescent Moon comes none too soon for deployed U.S. service personnel. Little, if any, of their battlefield intelligence has been tactically interpreted. U.S. analysts are generally ... > read more

National Electrical Code 2005 Handbook (National Fire Protection Association//National Electrical Code Handbook)
Produced by the NFPA, the popular National Electrical Code® 2005 Handbook contains the complete text of the 2005 edition of the NEC® supplemented by helpful facts and figures, full-color ... > read more

Space Mission Analysis and Design, 3rd edition (Space Technology Library) (Space Technology Library)
This practical handbook for Space Mission Engineering draws on leading aerospace experts to carry readers through mission design, from orbit selection to ground ops. SMAD III updates the technology, ... > read more

National Electrical Code 2005 Softcover Version (National Fire Protection Association National Electrical Code)
The #1 electrical reference, the 2005 National Electrical Code®, is available through today's #1 electrical publisher, Thomson Delmar Learning! The single most important reference in the ... > read more

First Man : The Life of Neil A. Armstrong
On July 20, 1969, the world stood still to watch thirty-eight-year-old American astronaut Neil A. Armstrong become the first person ever to step on the surface of another heavenly body. Perhaps no ... > read more

Horizons : Exploring the Universe (with TheSky CD-ROM, AceAstronomy, and Virtual Astronomy Labs)
This newly revised and updated Ninth Edition of HORIZONS shows students their place in the universe ? not just their location, but also their role as planet dwellers in an evolving universe. ... > read more

Geosystems : An Introduction to Physical Geography (6th Edition)
Geosystems is written, organized, and illustrated to give new learners an accessible, systematic, and visually appealing start in the study of physical geography. This edition includes the brand new ... > read more

Kaplan NCLEX-RN Exam 2005-2006 with CD-ROM (Kaplan Nclex-Rn Exam)
Exam review provides information for those preparing to take the NCLEX-RN exam. Includes strategies for exam success, complete reviews of all question formats and in-depth analysis of the ... > read more