TimeAndSpace.Science

Gravity, motion, time and space. Learn about 12/24 hr clocks, time zones, events, sunrise and moonrise, the tides, planets and their moons, and the solar system. Built for classrooms and for anyone else who is curious.

Right now

Half the Earth is in daylight right now — this map is live, repainted from the real motions every minute. Everything on this site works like that.

The sun is overhead at 10.8° N — north of the equator, so the northern half of the world is having its summer.

New York9:11 PM London2:11 AM Tokyo10:11 AM Sydney11:11 AM

Play the next 7 days → Why the tropics are there → Every time zone →

Start with a question Why is the night sky so dark? Why do the planets orbit the sun instead of falling in? Why do we have seasons? Why does the moon change shape? More questions →

Time

Everything in Time →

Clocks, and what they are counting — all running in your browser, nothing to install, no sign-up.

Alarm, timer & stopwatch Set an alarm, run a countdown, time every lap — digits big enough for the back row. World clock What time it is anywhere on Earth, and why the line between day and night leans. Countdowns How long until the day you are waiting for — holidays, launches, eclipses, the last day of school.

Earth

Everything in Earth →

Your own sky, worked out for your own town — computed from the real motions, never looked up in a table.

Sunrise & sunset Tonight's sunset, tomorrow's sunrise and the whole year of daylight, for over 1,100 towns. Tonight's moon The phase over your house tonight, and every night for the next month. Tides When the water turns on 165 US coasts — and why the moon gets to decide. The moon, round the Earth The sun holds still on the left while the moon takes its month-long lap — sped up so a month passes in about 24 seconds. This picture IS the phases.

Space

Everything in Space →

Where everything actually is, right now — positions solved when the page loads, not drawn from memory.

The planets Every world in orbital order, each turning on its own axis with its moons going round it. Solar system simulator The real orbits at their real speeds — drag a month, a year, or a century. Gravity & orbits Slow a planet down and watch what gravity does about it. Then try to hit the sun. The solar system, flat-on The four inner planets on their real orbits, a year every 24 seconds — watch Mercury lap everybody. That difference in speed is the whole story of orbits.

A diagram has to be believed. A simulator can be asked: slow the planet down, drag the month, tilt the axis — and children see WHY it happens, not just that it does. Everything runs on a projector or a school Chromebook, free, with nothing collected from anyone.

Questions that open the door Why is the night sky so dark? Why do the planets orbit the sun instead of falling in? Each answered honestly, each answer handing you the next. Lesson plans Timed and ready to project, K–2 to high school — every step a link that opens the exact view, with a printable student sheet. Classroom guide Projector mode, keyboard shortcuts, and what a browser timer can and cannot be trusted with.

Have a lesson in mind? Let's build it together.

This site gets better by being taught from. If you have an idea that would make it better — or a lesson you'd like to build together and share with everyone — reach out. We'll shape the tool around your class, write the plan with you, and publish it free for every other classroom. If we build your idea, your class is credited on the page, and how that works is written down.

Already teach it? Then skip all this and just send us the lesson you run — or the questions your class asked. Both are faster than the form below, and both end up in the same inbox.

How this site works

Computed, never copiedEvery figure is worked out live from the real motions. Where a picture is not to scale, it says so — in numbers. How each number is worked out →

Free, with nothing attachedNo account, no app, no ads, nothing for sale, nothing collected from children. Why it exists, and how it is paid for →

Built with the people who use itIf a class asks for something and we build it, the class is credited on the page. How that works →

Guides: using this in a classroom · how these numbers are worked out · how the site works · browser limitations · about this site.

💡 Question, problem or idea? Tell us →