How to see a once-in-a-lifetime green comet: Mount Everest-sized space rock dubbed the 'Mother of Dragons' makes its first visit to the inner solar system in more than 70 years - and you won't even need a telescope to see it!

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3. How to see a once-in-a-lifetime green comet: Mount Everest-sized space rock dubbed the 'Mother of Dragons' makes its first visit to the inner solar system in more than 70 years - and you won't even need a telescope to see it!