Scientists are the researchers that find the evidence to support the hypotheses and inventions. They are concerned with finding Earth-like planets to find life-sustaining elements.
The solar system is the system that contains the planets. Scientists are keen to find earth-like planets so they can find the elements that can sustain the elements supporting life.
The planets that have a similar environment as that of the earth will be helpful for mankind and will help find organisms similar to that of earthlings.
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