Friday 26th January 2024
Difficulty: Easy
(Public domain)
1. It has often been said that the Great Wall of China is the only artificial object visible from the Moon. But is this actually true?
2. The International Space Station (ISS) orbits at a height of around 400 km. If you wanted to write a text message on the ground that could be read from the ISS, approximately how tall would the letters have to be?
3. The image above shows a photograph taken from the International Space Station. What is shown in the picture?
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