Nasa: Imagine the Universe: Welcome to the World of Multiwavelength Astronomy!

Digital compass alignment enables navigation of the skies with true orientation at any time. Just point to the sky or "aim for the stars!" This application acts as a virtual telescope, allowing you to zoom in on any object that is...

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.

A list of answers to many questions related to quasars and active galaxies.

A brief description of supernova remnants with many embedded links to help define terms used in the description. The specific topics are age and the importance of remnants to us and the types. Definitions of key words are provided.

This NASA article discusses the history of gamma-ray astronomy. Related resources.

Brief description of white dwarfs with respect to their position in the life cycle of stars, the density of white dwarfs, the emissions of white dwarfs, and the temperatures associated with them.

Astronomers use gamma decay to study the lives of the stars.

This helpful site provides everything you want to know about studying the universe. Take a look at the tools and methods scientists use to study the universe, discover some of the objects that make up our universe, learn how scientists...

Supernovae are divided into two basic physical types, including a description of supernova types and how they are classified based on the existence of hydrogen spectral lines. Definitions of key terms are provided.

A detailed description of a supernova developing from a single massive star. There is a quiz, related links, animation, lesson plans, and an FAQ sheet available also.