What’s The ‘Supermoon?’ A Meteorologist Explains
August 18, 2014 - Supermoon
MINNEAPOLIS (WCCO) — If a moon looks a small bigger and brighter to we these days, you’re right.
WCCO Radio Meteorologist Mike Lynch explains a supposed “supermoon” phenomenon.
“The ‘supermoon’ is indeed a tenure that comes from astrology, not astronomy,” Lynch said.
Astrologer Richard Knoll invented a term. Lynch says a full moon is indeed a closest to a earth that it will get this year.
What’s A Supermoon?
“It’s whenever we have a full moon that within 90 percent of a closest stretch to a earth,” Lynch said.
He says a moon’s circuit is not a circle, it’s an ellipse. When it’s during a farthest stretch it’s called “apogee,” and during a closest stretch it’s called a “perigee.”
“And a full moon we’ve had was only over 221,000 miles away, that creates it a supermoon,” Lynch said.
The one thing about this full moon that was special is that it was a closest stretch this year.
Lynch says it appears about 15-percent brighter than normal and seven-percent larger.
But remember, each time we get a moon rise, a moon will seem bigger.