Best Time To See The “Super Perigee Moon” Is Tonight! (14% Larger, 30% Brighter – Here’s The Science Bit With Audio & Video


Tonight, a full Moon of rare size and beauty will rise.  It’s a super “perigee moon”–the biggest in almost 20 years.

Listen to this article:

“The last full Moon so big and close to Earth occurred in March of 1993,” says Geoff Chester of the US Naval Observatory in Washington DC. “I’d say it’s worth a look.”

Full Moons vary in size because of the oval shape of the Moon’s orbit. It is an ellipse with one side (perigee) about 50,000 km closer to Earth than the other (apogee):  Nearby perigee moons are about 14% bigger and 30% brighter than lesser moons that occur on the apogee side of the Moon’s orbit.

The full Moon tonight occurs less than one hour away from perigee–a near-perfect coincidence1 that happens only 18 years or so,”

A perigee full Moon brings with it extra-high “perigean tides,” but this is nothing to worry about, according to NOAA. In most places, lunar gravity at perigee pulls tide waters only a few centimeters (an inch or so) higher than usual. Local geography can amplify the effect to about 15 centimeters (six inches)–not exactly a great flood.

The Moon looks extra-big when it is beaming through foreground objects–a.k.a. “the Moon illusion.”

Indeed, contrary to some reports circulating the Internet, perigee Moons do not trigger natural disasters. The “super moon” of March 1983, for instance, passed without incident. And an almost-super Moon in Dec. 2008 also proved harmless.

Okay, the Moon is 14% bigger than usual, but can you really tell the difference? It’s tricky. There are no rulers floating in the sky to measure lunar diameters. Hanging high overhead with no reference points to provide a sense of scale, one full Moon can seem much like any other.

The best time to look is when the Moon is near the horizon. That is when illusion mixes with reality to produce a truly stunning view. For reasons not fully understood by astronomers or psychologists, low-hanging Moons look unnaturally large when they beam through trees, buildings and other foreground objects. On March 19th, why not let the “Moon illusion” amplify a full Moon that’s extra-big to begin with? The swollen orb rising in the east at sunset may seem so nearby, you can almost reach out and touch it.

Don’t bother. Even a super perigee Moon is still 356,577 km away. That is, it turns out, a distance of rare beauty.

Source: http://science.nasa.gov/science-news/science-at-nasa/2011/16mar_supermoon/

3 thoughts on “Best Time To See The “Super Perigee Moon” Is Tonight! (14% Larger, 30% Brighter – Here’s The Science Bit With Audio & Video

  1. Pingback: Perigee | Video, Torrent, Downloads | Poodlesnatcher

  2. Pingback: The Super Perigee Moon As Viewed From Leicester (19/03/11) « Chronowerx

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s