Frequently Asked Questions
Practical answers about calculation methods, accuracy, accessibility, privacy, and educational use.
Calculations and accuracy
How accurate are the SkyMotion calculators?
The calculators use deterministic equations and the constants documented on each tool. Results are suitable for education, planning, and comparison, but rounded inputs and simplified physical models can differ from laboratory measurements or real-world conditions.
Which scientific sources are used?
Solar calculations reference NOAA and U.S. Naval Observatory methods, lunar calculations follow Jean Meeus, and mechanics tools use established kinematics, friction, and gravity equations with cited constants.
Why can sunrise or golden-hour times differ from another app?
Differences can come from atmospheric refraction assumptions, elevation, local terrain, rounding, daylight-saving rules, or the exact definition of sunrise and twilight. SkyMotion states the model used beside each calculator.
Do the mechanics calculators include every real-world force?
No. Each tool states its assumptions. For example, free fall may neglect air resistance, while braking distance depends on the selected reaction time and friction coefficient. These models explain the dominant physics without claiming to replace engineering analysis.
Using the site
Can I use SkyMotion for school or teaching?
Yes. Students and educators may use the calculators and explanations for classroom and non-commercial educational work. Cite SkyMotion.tools when reproducing results or explanations.
Are calculations performed on the server?
Interactive calculations run in your browser. Most tools do not need to send entered values to a server, which keeps interactions fast and limits unnecessary data collection.
Does SkyMotion work with a keyboard or screen reader?
The site provides a skip link, labelled controls, visible keyboard focus, semantic headings, and accessible states for interactive options. Accessibility improvements are tested continuously across calculators and shared navigation.
How do I report an incorrect result or accessibility problem?
Use the Contact page and include the calculator URL, the values entered, the result you expected, and your browser or assistive technology when relevant.
Privacy and site support
Does SkyMotion store the values I enter?
Calculator inputs are normally processed locally in the browser. For details about analytics, cookies, and contact data, consult the Privacy Policy and Cookie Policy.
Why are there Amazon product links?
Some equipment and book links are affiliate links. SkyMotion may earn a commission from qualifying purchases at no additional cost to the visitor. Recommendations do not affect calculator results.