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National Aeronautics and Space Administration

Goddard Space Flight Center

Astrophysics Science Division | Sciences and Exploration

This website is kept for archival purposes only and is no longer updated.


NASA Policy Notices

IT Security Warning

You have accessed a U.S. Government Resource. This site is intended to be used by the public for information exchange.

Any attempt to modify or exploit this resource or associated information other than for instructed use is strictly prohibited and may be punishable under the Computer Fraud and Abuse Act of 1986.

The government may monitor and audit the usage of this resource. All persons are hereby notified that use of this resource constitutes consent for monitoring, keystroke recording, or auditing.

NASA Website Privacy Statement

This policy establishes how NASA will use information we gather about you from your visit to our website. The privacy of our customers is of utmost importance to NASA. If you visit a NASA site...

    1. To read or download information:
    We may collect and store information for statistical purposes. For example, we may count the number of visitors to the different sections of our site to help us make them more useful to visitors. Similar information is gathered for anonymous ftp, remote account login, or for other comparable types of connections.
    2. To send us an E-mail:
    By sending us an electronic mail message, you may be sending us personal information (e.g., name, address, E-mail address), as in an official FOIA request. We may store the name and address of the requester in order to respond to the request or to otherwise resolve the subject matter of your E-mail.
    3. To register:
    Some of our sites ask visitors who request specific information to fill out a registration form. For example, vendors looking for marketing opportunities by visiting our NASA Acquisition Internet Service sites may be asked to "register" to obtain email notices of business opportunities. Other information which may be collected at these sites through questionnaires, feedback forms, or other means, enable us to determine a visitor's interests, with the goal of providing better service to our customers.

We want to be very clear: regardless of the information being transmitted to NASA, we will protect all such information consistent with applicable law.

Website Linking Disclaimer Statement

Thank you for visiting this NASA website. NASA may provide links to web pages that are not part of the NASA web family, or nasa.gov domain. These sites are managed by organizations, companies, or individuals not under NASA control, and NASA is not responsible for the information or links you may find there. NASA provides these links merely as a convenience and the presence of these links is not NASA endorsement of the site.

NASA Website Accessibility Statement
The majority of pages on this website are accessible to individuals with disabilities in accordance with Section 508 of the Rehabilitation Act. If you have accessibility problems, please let us know.