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When an astronomer discovers one of these he does not give it a name, but only a number. He might call it, for example, "Asteroid 325. "
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Nowadays the light collected by the lens or mirror of a telescope is directed to a photographic plate rather than to the astronomer's eye.
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"It was a memorable experience and I feel lucky to [have seen] it, " astronomer Gianluca Masi of Rome, Italy, told Space. com.
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In fact, a typical astronomer spend most of he or her time analysing data and may only be at the telescope about few weeks of a year.
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The typical tour is accompanied by an astronomer and takes in astronomical sites along the way as well as more traditional attractions.
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