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 The total "supermoon" lunar eclipse, also known as a "blood moon"
is one that appears bigger and brighter than usual as it reaches the
point in its orbit that is closest to Earth.
"There’s no physical difference in the moon. It just appears
slightly bigger in the sky," planetary geologist Noah Petro, with
NASA’s Goddard Space Flight Center in Greenbelt, Maryland, said.
If skies are clear, the phenomenon will be visible from North and
South America, Europe, Africa and parts of West Asia and the eastern
Pacific. In the United States, the eclipse begins at 8:11 p.m. EDT.
The total eclipse starts two hours later and lasts for one hour and
12 minutes.
 It has been more than 30 years since a supermoon combined with a
lunar eclipse, said NASA. The next total lunar eclipse will not be
until 2018. The next supermoon-lunar eclipse combination will not
happen until 2033.
For more than an hour Sunday night, Earth’s shadow will blanket the
full moon as the planet passes between the sun and the moon. The
brilliant white glow of the moon will slowly transform into a dim
red. The coloring is caused by Earth’s atmosphere scattering
sunlight into the shadow.
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Because the moon is not perfectly round, its distance from Earth varies by about
31,000 miles (49,900 km) as it circles around the planet every 27 days.
At its closest point, known as perigee, the moon comes as close as 225,622 miles
(363,104 km) from Earth. At apogee, the most distant point, the moon is 252,088
miles (406,696 km) away.
(Reporting by Irene Klotz; Editing by David Adams and Grant McCool)
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