The Universe Forum is the national center for teaching and learning about the structure and evolution of the universe. Sponsored by NASA and based at the Harvard-Smithsonian Center for Astrophysics, the Forum uses the...

This site discusses cosmologists current understanding of the inflationary universe theory. It poses the question: "Was cosmic inflation the "bang" of the big bang?" Chapters include 1. Introduction; 2. A very special...

This Web site is an on-line version of a poster and educator guide describing the cosmic origin of the chemical elements. The poster illustrates our connection to the chemical elements and their origins. The educator...

This Windows to the Universe feature from the University Corporation for Atmospheric Research (UCAR) provides background information about Pluto, the newly classified dwarf planet. The site provides descriptions of the...