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- The largest known star, UY Scuti, is so large that it could contain over 5 billion of our suns.
- Space is completely silent because there is no atmosphere to transmit sound waves.
- The first living beings to travel to space were fruit flies, sent on a rocket by the US in 1947.
- The surface area of Pluto is less than that of Russia.
- The highest mountain in the solar system is Olympus Mons, which is located on Mars and is three times taller than Mount Everest.
- Saturn is the only planet in the solar system that is less dense than water.
- In space, an astronaut’s suit is equipped with a system that collects and recycles their urine into drinking water.
- The temperature on the Moon can range from -173°C to 127°C.
- A day on Venus is longer than a year on Venus. It takes 243 Earth days for Venus to rotate once on its axis, but only 225 Earth days to orbit around the sun.
- The Voyager 1 spacecraft, launched in 1977, is now over 14 billion miles away from Earth and has entered interstellar space.