Blue moonBlue moon, supermoon, total lunar eclipse rolled into one
CAPE CANAVERAL, Fla. (AP) — The moon is providing a rare triple treat this week.
On
Wednesday, much of the world will get to see not only a blue moon and a
supermoon, but also a total lunar eclipse, all rolled into one. There
hasn't been a triple lineup like this since 1982 and the next won't
occur until 2037.
The
eclipse will be visible best in the western half of the U.S. and Canada
before the moon sets early Wednesday morning, and across the Pacific
into Asia as the moon rises Wednesday night into Thursday.
The
U.S. East Coast will be out of luck; the moon will be setting just as
the eclipse gets started. Europe and most of Africa and South America
also will pretty much miss the show.
A
blue moon is the second full moon in a month. A supermoon is a
particularly close full or new moon, appearing somewhat brighter and
bigger. A total lunar eclipse — or blood moon for its reddish tinge —
has the moon completely bathed in Earth's shadow.
"I'm
calling it the Super Bowl of moons," lunar scientist Noah Petro said
Monday from NASA's Goddard Space Flight Center in Greenbelt, Maryland.
Others prefer "super blue blood moon."
Either way, it's guaranteed to impress, provided the skies are clear.
The
moon will actually be closest to Earth on Tuesday — just over 223,000
miles (359,000 kilometers). That's about 1,500 miles (2,400 kilometers)
farther than the supermoon on Jan. 1. Midway through Wednesday's
eclipse, the moon will be even farther away — 223,820 miles (360,200
kilometers) — but still within unofficial supermoon guidelines.
While
a supermoon is considered less serious and scientific than an eclipse,
it represents a chance to encourage people to start looking at the moon,
according to Petro.
"I'm a lunar scientist. I love the moon. I want to advocate for the moon," he said.
Throw in a blue moon, and "that's too good of an opportunity to pass," according to Petro.
As
the sun lines up perfectly with the Earth and then moon for the
eclipse, scientists will make observations from a telescope in Hawaii,
while also collecting data from NASA's moon-circling Lunar
Reconnaissance Orbiter, launched in 2009.
Just
like the total solar eclipse in the U.S. last August cooled the Earth's
surface, a lunar eclipse cools the moon's surface. It's this abrupt
cooling — from the heat of direct sunlight to essentially a deep freeze —
that researchers will be studying.
Totality will last more than an hour.
"The
moon is one of the most amazing objects in our solar system," Petro
said. "It really is the key to understanding the solar system, through
interpreting the geology and surface of the moon."
NASA plans to provide a live stream of the moon from telescopes in California and Arizona, beginning at 5:30 a.m. EST.
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