Tomorrow night the new moon will make a close approach to Earth, giving rise to the second supermoon of the year - but this one will have the power of invisibility. Because the moon's orbit is egg shaped, there are times in the roughly monthlong lunar cycle when the moon is at perigee - its closest distance to Earth - or at apogee, its farthest distance from Earth. "A supermoon occurs when the moon is at perigee and it's in either a full or new phase," said Raminder Singh Samra, an astronomer at the H.R. MacMillan Space Centre in Vancouver, Canada
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