Comet Lemmon is set to make its closest approach to Earth in around 1,300 years on Tuesday, with good viewing opportunities for the greenish cosmic snowball expected until Nov. 2 as it brightens upon nearing the Sun.While the comet will be difficult to see with the naked eye, it can be captured on long camera exposures pointed low at the western sky around an hour after sunset, according to the National Astronomical Observatory of Japan.On Sunday, observers in the Tokachi region in Hokkaido were able to clearly photograph the comet near the Big Dipper constellation in the northwestern sky b…READ FULL ARTICLE