Terms of Use
Last updated: .
Using the site
Parallax is free to use for personal curiosity. You're welcome to use the calculators, share the links, and include the results in your own writing with attribution.
No warranty
These calculators are built for fun and perspective, not for precision. Orbital periods are standard sidereal averages; results are rounded. Nothing here is medical, legal, financial, or actuarial advice, and none of it should be used to make serious decisions about your health, money, or mortality.
The site is provided "as is," without warranty of any kind, express or implied.
Limitation of liability
To the maximum extent permitted by law, Parallax and its maintainers are not liable for any direct, indirect, incidental, or consequential damages arising out of your use of the site.
Acceptable use
You agree not to: (a) attempt to disrupt or compromise the site; (b) scrape the site aggressively; (c) reproduce the site as a whole and present it as your own work.
Intellectual property
The design, copy, and code of Parallax belong to us. The underlying science (planetary orbits, day lengths) is public domain. Linking to the site is always welcome.
Third parties
This site displays ads via Google AdSense. Google's terms and privacy policy apply to their services — see the Privacy Policy for links.
Changes
We may update these terms. Material changes will be noted at the top and, for big changes, on the homepage for 30 days. Continuing to use the site after a change constitutes acceptance.
Contact
Questions? Send a note.