National Aeronautics and Space Administration - Marshall Space Flight Center
NASA's Science Goals
Proposing a Mission
The Program Office
Overview of Missions
Missions of Opportunity
Just 4 Kids
Out of School
In the Classroom
Small Worlds, Big Questions
Why We Explore
How We Explore
What We're Learning
Cool Stuff for Students
| Go Deeper
News and information about approaching asteroids and comets, including a downloadable widget with upcoming approaches.
Near Earth Object Program
bject Program coordinates NASA-sponsored efforts to detect, track and characterize potentially hazardous asteroids and comets larger than one kilometer in diameter that could approach the Earth.
Astronomy resources and general information.
Solar System Exploration
NASA's guide to the planets and small bodies of our solar system and the missions and people that are exploring them.
Small Bodies of the Solar System
NASA's missions to comets, asteroids and other small bodies are revealing clues about the solar system's early history and evolution and how life came to exist on Earth.
American Museum of National History
The Arthur Ross Hall of Meteorites is fascinating to visit but if you're not in New York, visit the web site.
The Barringer Crater
Learn about this giant crater in Arizona, created when a meteorite hit Earth about 50,000 years ago, and the quest to understand its origin.
Learn more about asteroids and comets, play a physics based asteroid game or hit any spot in the world with an asteroid using the Google Earth Impact simulation.
MITS Applications and Web Services
Budgets, Strategic Plans and Accountability Reports
Equal Employment Opportunity Data
Freedom of Information Act
Inspector General Hotline