




| • | References for Hard Science-Fiction Writers: As it says, the real science and some thoughtful tutorials on how to get it right. |
| • | Apparent Angular Diameter Calculator: Just how big is that moon in the sky anyway? |
| • | Plan a Planet Orbiting a Main Sequence Star: Not just a world builder, but an idea generator. |
| • | Hard Science Fiction Tools: A number of different astronomical and relativistic tools. |
| • | Atomic Rockets: a page explaining everything rocket, with emphasis on the atomic variety. |
| • | Science Fiction/Space Technology: A NASA site about the technology of space travel. |
| • | Orbital Vector: A Speculative Technology Database. Good for ideas. |
| • | Kinetic Energy Equations and Formulas Calculator: How much energy does that asteroid generate when it hits the Earth? |
| • | Space.com: All kinds of good stuff for the space minded. Pictures, articles. video. |
| • | Hyperphysics: All kinds of physics lessons from the Georgia State University. |
| • | The Universe Within 50,000 Light Years: Cool interactive map of the Milky Way. |
| • | 3D Galaxy Map: Another very cool interactive map of the Galaxy. |
| • | Space Telescope Science Institute: Astronomy resources, news, pictures. |
| • | Planet Designer: Another cool program, for the development of realistic planets. |
| • | Structural Mass Calculator: Want to know how big you spaceship can be? Calculate it here. |
| • | Planets: Orbital simulator of planets around a star. |
| • | Planetary Classification: Get it right the first time when describing planetary types. |
| • | Encyclopedia of Science: From the Worlds of David Darling. All kinds of good information and facts. |
| • | Nasa: The source of all things space program. |
| • | Hubblesite: All things Hubble. Images to stir the imagination and the soul. |
| • | Astrobiology: From The Living Universe at Oracle ThinkQuest. Lots of good information. |
