Contains over 200 entries covering broad definitions and concepts, case studies from five continents, themes and issues, objects in the sky as the focus of myth, basic concepts, and influential people...

Contains biographical sketches of notable astronomers from the ancient world to the 20th century...

Covers the field of astronomy and astrophysics with 2500 peer-reviewed articles...

"Covers all major areas of science, engineering, technology, as well as mathematics and the medical and health sciences, while providing a comprehensive overview of current scientific knowledge and technology...

Contains more than 350 entries that "both illuminate the ideas behind the current understanding of the universe and outline the fundamental physics from which those ideas emerge...

Online encyclopedia covering many areas in the sciences: chemistry, computer science, earth science, environmental science, forensic science, mathematics, physics, space and astronomy, and weather and climate...

"From the history of space exploration to the future of "space business," this set offers a broad survey of the space sciences...