This resource provides an explanation of NASA's GALEX mission and how the space-based telescope can view distant galaxies as they were billions of years ago. The resource also discusses the other aspects of galaxies that GALEX...

Chemistry classes will appreciate this color-coded, single-page reference sheet for The Standard Model of particle physics. It is divided into two main sections: elementary particles and compound particles, both with their antiparticles....

Basic information about the universe, its origin and composition. Also includes information about galaxies, stars, and the sun.

Provides a general overview of irregular galaxies, including a specific look at type I and type II irregulars.

Kid's learn about the science of Galaxies. Large groups of stars such as the Milky Way throughout the universe are an interesting part of astronomy.

A NASA scientist, Dr. Sten Odenwald, answers many students' questions. Topics include planets, galaxies, black holes, the origin of the universe, and common misconceptions about space.

Site recounts how X-rays were discovered as well as who discovered them. Offers graphics, links to facts on this topic, a quiz, and teacher resources.

With exciting illustrations, NASA's Space Place explains the theory of the origin of the universe known as the Big Bang.

This site examines the black hole as an object in astrophysics. Delve into this comprehensive resource that covers this concept from its history, to qualitative physics, the reality of black holes, mathematical physics and more.