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Space Technology

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Where Is the International Space Station Right Now

The International Space Station circles Earth about every 90 minutes, so its ground track shifts with each orbit. To know exactly where the ISS is now, use real-time tracking ma...

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Hubble Pictures of Earth: How the Telescope Captures Images of Our Planet

Hubble pictures of Earth are produced when the Hubble Space Telescope is intentionally pointed at Earth to capture observations used for calibration, instrument testing, and spe...

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The Geosynchronous Space Elevator Problem: Tension, Physics, and Engineering Reality

A geosynchronous space elevator relies on a cable under extreme tension to reach beyond geosynchronous orbit. The central physics problem is balancing gravitational pull, centri...

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