What are some interesting facts about space?

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1. The largest known structure in the universe is the Hercules-Corona Borealis Great Wall, which measures over 10 billion light-years across. 2. There are more possible iterations of a game of chess than there are atoms in the observable universe. 3. The sun makes up 99.86% of the total mass of the solar system. 4. The hottest planet in our solar system is Venus, with surface temperatures that can reach up to 471 degrees Celsius. 5. The International Space Station travels at a speed of approximately 28,000 kilometers per hour (17,500 miles per hour) and orbits Earth about once every 90 minutes. 6. The nearest star to Earth, Proxima Centauri, is still over 4 light-years away. 7. A day on Venus is longer than a year on Venus - it takes about 243 Earth days for Venus to rotate on its axis, but only about 225 Earth days for it to orbit the sun. 8. Jupiter is the largest planet in our solar system, and could fit all of the other planets inside it. 9. Astronauts in space grow up to 3% taller due to the lack of gravity compressing their spines. 10. Scientists estimate that there may be as many as one trillion galaxies in the observable universe.
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