JavaScript allows activities to be interactive. When a browser finds JavaScript in a web page, one of two things can happen. If your browser understands JavaScript, it will download the script to your computer along with the page. If your browser doesn't understand JavaScript, it will ignore it and download the rest of the page.

Activities done in JavaScript will work if you are using Netscape 3 (and higher) or Microsoft Internet Explorer 4.01 (and higher). These activities will load as quickly as the CGI versions and should work faster once they are loaded. You must have JavaScript enabled (turned on in your browser) in order for the activity to work.


The StarChild site is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/ GSFC.

StarChild Authors: The StarChild Team
StarChild Graphics & Music: Acknowledgments
StarChild Project Leader: Dr. Laura A. Whitlock
Curator: J.D. Myers
Responsible NASA Official: Phil Newman