How did water come to earth?


Other planets in our solar system do not have liquid water. Why is this and why is it different on Earth? Meteorites provide the answer.

earth from above

Two-thirds of the earth is covered by water, but where does it come from?

Photo: Panthermedia.net/TsuneoMP

Have you ever wondered how water got to earth when it doesn’t exist in liquid form on other planets in our solar system? Did the chemical basis for this originate on earth, or did water come to us from space? The debate about this has been heated again. Also encouraged by the current England research report. On February 28, 2021, a meteorite weighing about 500 grams, containing water, hit the small town of Raganko on February 28, 2021.

Two-thirds of the earth is covered by water

Two-thirds of our land is covered by water, with vast oceans juxtaposing small landmasses. This gives our planet a unique selling point not found on Mars, Mercury, Venus or Jupiter – at least not in liquid form. Either the planets don’t have enough gravity to maintain an atmosphere (Mercury), or are too cold (Mars) or too hot (Venus).

It is different on Earth, but from the beginning there was no water. It was originally a glowing hot lump like other planets. Gravity, which acts equally in all directions, shaped it into a sphere. And the water? Scientists suspect that it originated from comets. These formations of dust and ice originally came from the outskirts of the Solar System, but some also entered the inner Solar System and became part of the newly forming Earth. Because it was too hot there to begin with, the ice evaporated and entered the atmosphere.

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It was only when the earth slowly cooled that steam from the atmosphere became water on earth. Researchers suspect that it must have rained for tens of thousands of years to form the vast oceans. In places, the water reached up to ten kilometers. Something similar happened on other planets, only liquid water could not accumulate on them for the reasons mentioned above. And so it happened, as it was supposed to happen: life developed on earth in the form of plants, animals or humans, while it remained barren and inhospitable on the other planets of our solar system.

How the Witchcombe meteorite helps research

in 2021 on February 22, around 10 p.m., a fireball fell toward Earth and crashed into a road in the English town of Witchcombe. 16 special meteorite cameras have recorded and approximately 1,000 mobile phone cameras have recorded. The townspeople immediately ran out into the street, put on gloves and collected small pieces of rock. Fortunately, the material could still be recovered for science.

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