Terms of Service

About Polygonal Space

Polygonal Space ("this website") is a web application which displays image and text data retrieved from "NASA Image and Video Library" provided by NASA (The National Aeronautics and Space Administration). This application uses NASA API to access the library.

One of our main purposes in this website is to provide users with educational information about the space. The users of this website ("users" including those who visit or use our website) can use our service in this webiste at free of charge. You can become a registered user ("registered user") by completing signup process. Some of our service are restricted to registered users.

We prepared space-related keywords that are listed in the search page. You can use the keywords to search for NASA articles. Our application gets the selected keyword, sends a query to NASA website, and retrieves a search result to display for you. One of the key features of this website is to search for NASA image and text data with Japanese keywords prepared mostly for Japanese users. English keywords are also provided for search.

You can create your user account with email address and password or via Google authentication. We prepared bookmark feature for registered users. With this bookmark feature, you can save your favorite in your account so that you can read them later on.



As mentioned above, this website retrieves NASA image and text data by using NASA API. We comply with NASA's "Media Usage Guidelines" ("NASA Media Usage Guidelines") in regard with retrieving and displaying NASA imaege and text data.

According to NASA Media Usage Guidelines, NASA content including images, audio, video, and computer files may be used for educational or informational purposes without needing explicit permission, subject to compliance with these guidelines.

This website, complying with NASA Media Usage Guidelines, mentions the source of image and text data that are retrieved from NASA.

We do not own copyright of the image and text data that are retrieved from NASA and displayed in this website.

We are the copyright holder of our own content that are created by ourselves. Specifically, we are the copyright holder of the content that are neither retrieved from NASA nor any other third-party websites.

Usage of

Data Displayed in This Website

When you use the image and text data retrieved from NASA in this website, you should comply with the NASA guidelines including NASA Media Usage Guidelines regarding usage of data provided by NASA.

Limits on liability

In no event shall the administrator of this website be liable for any consequential damages in relation with contents displayed in this website.

In no event shall the administrator of this website be liable for any actions made by a users of this website in relation with contents displayed in this website.

Please be noted that we may change or delete information or URL in this website, or stop our service without notification

Account Suspension and Termination

If you have a user account, you can delete your account at anytime. Specifically, you can delete your account in your "My Page".

We may suspend or delete user's accounts in our sole discretion. In most cases, we will give you a notice before or after suspension or deletion of your account. However, we may proceed to suspend or delete your account without notification.

How you may contact us

If you have inquiries or concerns with regards to this terms of service, please contact us.

Changes to Terms of Service

We may change our Terms of Service from time to time, and in our sole discretion. We encourage you to frequently check this page for any changes to the Terms of Service.

In the case where any changes are applied to the Terms of Service, the latest version of the policy will be displayed in this page.

Your continued use of this site after any change in this Terms of Service will constitute your acceptance of such change.

Effective as of 10-25-2021