Kids learn about astronomy, the study of outer space including the stars, planets, comets, black holes, and the Solar System. History and astronomers in this astronomy for teachers and kids section.

Scientists have known for hundreds of years that sunspot activity waxes and wanes over a cycle that lasts approximately 11 years. In the 1970's, scientists discovered that the sun periodically blasts electrified gases into space, in huge...

Investigate the field of astronomy in this book by Sten Odenwald where he talks about his own and others' experiences, as well as his experiences doing research.

"Astronomy is the science that studies the Earth, the Moon and other objects in space. It has helped us discover our place in the physical universe. It is still making discoveries." This landing page gives options for students and...

The Milky Way is the edgewise view of our home galaxy, a disk made up of billions of stars. The Sun resides on one of the spiral arms of the disk, 30,000 light-years from the thick hub of the galaxy. The actual center, with a black hole...

Universe Today is an online news source covering the latest in astronomy, space exploration, and more.

Infrared light lies between the visible and microwave portions of the electromagnetic spectrum. Infrared light has a range of wavelengths, just like visible light has wavelengths that range from red light to violet.

At the HubbleSite you can learn about Lyman Spitzer's (1914?1997 CE) inventions and accomplishments in the science field.

NASA site recounts the history of the Venus Transits that have occurred over the past centuries and the various descriptions astronomers have written about them.

Describes quasars as being classified within the category of an active galaxy. A description of the emergence of high-energy. Definitions of key words are provided.gamma-ray quasars as an important component of the gamma-ray sky.

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.

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.

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.