Education

Translation application for Linux desktop and mobile

If you head to bed right now, when should you wake up to feel refreshed? Use this sleep calculator to figure out exactly when to wake up or go to sleep.

Here is an interactive Flat Earth Model that can explain Sunrise, Sunset, Moonrise, Moonset, Moon Phases, Moon s apparent rotation, Sun s position on Equinox, Seasons, some aspects of Solar and Lunar Eclipses, Star trails, 24 hours Day Night at the Northpole and Antarctica, Celestial Poles, why people south of the equator can see the same Stars rotate clockwise around a singe celestial pole at the same time at different continents. But many aspects of reality are not solvable by this Model. The flat earth dome model had to be derived entirely from the heliocentric model which results are then simply projected onto the flat earth and the dome. To connect the flat earth projections with the dome projections, light must bend in a physically impossible way.

KDE Frontend to mathematical applications

Use this calculator to calculate and visualize what we can see of a target of a certain size and distance from any observer altitude, taking refraction into account. You can compare the results between flat earth and globe earth. Many more values are calculated and you can customize and store the settings.

Find thousands of incredible, original programming cheat sheets, all free to download.

Stellarium is a planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free.

See why millions translate with DeepL every day. Fast, accurate, and secure – translate texts and full document files instantly. Currently supported languages are: Bulgarian, Chinese, Czech, Danish, Dutch, English, Estonian, Finnish, French, German, Greek, Hungarian, Italian, Japanese, Latvian, Lithuanian, Polish, Portuguese, Romanian, Russian, Slovak, Slovenian, Spanish, and Swedish.

Wolfram|Alpha brings expert-level knowledge and capabilities to the broadest possible range of people—spanning all professions and education levels.

Free digital tools for class activities, graphing, geometry, collaborative whiteboard and more