Longest total lunar eclipse of 21st century coming Friday

The longest total lunar eclipse of the century is coming Friday, and it will transform the moon into a reddish orange color for more than 100 minutes, according to NASA.

The eclipse won't be visible from North America, Noah Petro, a scientist for the NASA Goddard Space Flight Center, told ABC News. Star-gazers in areas near the Middle East, south or eastern Africa, western and southeast Asia and India will be able to catch a glimpse of the celestial event as long as the weather permits, Petro said.

In those areas, the totality of the lunar eclipse -- when the moon will retain its red color -- will last for about an hour and 42 minutes. The entire event -- beginning as the moon passes through the Earth's stratosphere -- will last about six hours and 13 minutes, Petro said.

Residents in Australia will be able to see the lunar eclipse as the moon sets, while those in eastern Brazil and western Europe can see it as the moon is rising.

Petro suggested either renting a boat and driving it to the middle of the Indian Ocean or visiting relatives in Ethiopia for the "best seat in the house."

In the U.S., the lunar eclipse will start around 1:14 p.m. ET, and the maximum period of totality will start around 4:21 p.m. ET, making it too light outside for the blood moon to be visible, Petro said.

Although U.S. residents won’t be able to see the eclipse, they should still be excited because the Lunar Reconnaissance Orbiter -- NASA's robotic spacecraft orbiting the moon -- will experience it first-hand, Petro said. The LRO was launched in June 2009 to provide detailed maps to identify "safe and interesting" landing sites on the moon for future human and robotic exploration.

"The moon really holds the secret to understanding how the solar system works," Petro said.

It's a good time for Americans to start getting excited about the moon, as NASA will begin celebrating the 50th anniversary of Apollo 11, the the spaceflight that made astronauts Neil Armstrong and Buzz Aldrin the first two people on the moon, in October, Petro said. Armstrong and Aldrin landed on the moon on July 20, 1969.

The next total lunar eclipse visible in the U.S. will be on Jan. 21, 2019, according to NASA. It will be a super moon as well, which is a full moon or new moon that coincides with the moon's position at it's closest to the Earth.

A partial lunar eclipse -- which looks "like someone took a bite out of the moon -- will also be visible in the U.S. in July 2019, Petro said. The partial lunar eclipse involves the southern half of the moon passing into the earth's shadow, he added.

A blood moon is a term used to describe a total lunar eclipse, which is when the moon appears darkened as it passes through the Earth's shadow.

The total lunar eclipse is given the "blood" nickname because of the "beautiful" red color caused by the projection of all of the Earth's sunrises and sunsets onto its surface, Petro told ABC News earlier this year, before the super blue blood moon event that took place on Jan. 31.

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