Awnser : uninvented (not to invent)
Answer:
The right distance from the Sun is very important for supporting the life in the Earth. The Earth is protected from harmful solar radiation by its magnetic field. It is kept warm by an insulating atmosphere, and it has the right chemical ingredients for life, including water and carbon.
Explanation:
You can read information about this on (amnh dot org / planet-earth)
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Answer:
a Doppler shifts in stellar spectra of nearby star.
Explanation:
Doppler effect it was discover centuries after Galileo and Kepler. It was proposed by the scientist Christian Andreas Doppler in 1840´s and around that years others scientist started to do some experiments to find the same effect.
Also Galileo could observe the moons of Jupiter thanks to a telescope that he built. At the begging, he thought it was some other stars near the planet. He named them as Medician planets, in honor to the Medici family because there were four.
Both Kepler and Galileo always made drawings of the sky, that means that any changes like parallax stars or the movement of an extrasolar system like meteorites.
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