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Monday's event is impossible and dangerous to view with the naked eye or binoculars, but astronomy groups worldwide will offer a chance to view Mercury pass directly between Earth and the Sun through filtered telescopes and it will also be live-streamed online. Astronomer Jackie Flaherty told Newsday more about the Solar System's smallest planet and what we should expect today. (Picture: A composite image of observations by NASA and ESA shows the path of Mercury during its November 2006 transit. Credit: Solar and Heliospheric Observatory/NASA/ESA via AP)