Sun-Earth Days 2014

National Aeronautics and Space Administration

Goddard Space Flight Center

Sun-Earth Days 2014

Get Connected

Astronomical Leagues Near You

The Astronomical League is composed of over two hundred and forty local amateur astronomical societies from all across the United States. There basic goal is to encourage an interest in astronomy (and especially amateur astronomy) throughout America whether it is through their local astronomical society, school, or their own instruments, and use them to view the beauty in the heavens. Use this site to contact nearby astronomical societies that are members of the Astronomical League!

Association of Science and Technology Centers

Links to members.

International Planetarium Society

Worldwide Listing of Planetaria.

National Science Teachers Association

Local Chapters and Associated Groups

National Association of Geoscience Teachers

Regional Sections


Earth's magnetic poles reverse their geographic locations every 300,000 years. The last event happened 780,000 years ago.