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Ages 8-12ScienceGeography

🛰️ Sky Watch

Six real spacecraft are circling Earth right now. Their positions come from today's published orbit numbers and are recomputed every second. The dark part of the map is where it is night right now.

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Right now

Will it fly over me?

Pick a city to check the next pass.

What is going on up there?

  • Why the path curves. Each spacecraft flies in a nearly flat circle around Earth. Drawn on a flat map, that circle looks like a wave. Earth turns underneath it, so every lap crosses a new strip of the planet.
  • Lower means faster. Closer to Earth, gravity pulls harder, so the Space Station at about 260 miles up must fly faster than Landsat at 440 miles up. Try the quiz below to see it in the numbers.
  • Latitude and longitude. Latitude counts degrees north or south of the equator (the middle line). Longitude counts degrees east or west of a line through Greenwich, England. Together they name any spot on Earth.

🧠 Sky quiz

Each question comes with its own picture and table of the sky at that moment. Everything you need is on the card.

🚀 Meet the spacecraft

Tap one to follow it on the map.

Orbit numbers are refreshed a few times a day from public catalogs. Positions can be off by a few miles, and pass times by a minute or two. The night shading is computed from the Sun's position and is approximate near the poles.