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water is considered one of the essential elements constituting life on earth, and is also the most studied chemical compound in the universe by humans.

when we look at the night sky, we can see many stars. however, not all stars are the same and can be seen with the naked eye.

the length of the day in each planet depends on its distance to the sun, the orbital cycle (the time the planet orbits the sun) and the astronomical cycle (the time it spins around

every day, from the earth we see the sun from a distance of 149.6 million km, it looks like a giant glowing disk growing from the east. so if we stand on another planet in our

the smell of a planet is determined by the chemical composition of the atmosphere.

taking our earth as a benchmark, let's compare how massive the planets in the solar system are, the distance between them and how big the sun is.

below are impressive astronomical photos, becoming the invaluable asset of the human being that cassini spacecraft captured and sent.