[ti:Sky Watchers Prepare For the 'Super Bowl' of Moons] [by:www.51voa.com] [00:00.00]更多听力请访问51VOA.COM [00:00.04]This is What's Trending Today. [00:03.76]The moon is providing a rare triple treat this week. [00:10.00]On Wednesday, much of the world will get to see [00:14.44]not only a blue moon and a "supermoon," [00:18.72]but also a total lunar eclipse. [00:23.13]Having all three events taking place at the same time is extremely unusual. [00:31.64]Astronomers say this has not happened since 1982. [00:38.32]And it won't happen again until 2037. [00:44.52]A total lunar eclipse happens when the Earth [00:48.92]comes between the Sun and a full moon. [00:54.36]The Earth blocks the sun's light, [00:57.48]making the moon appear dark in the sky. [01:01.60]The eclipse will be easiest to see in the western half of the United States [01:09.12]and Canada before the moon sets early Wednesday morning. [01:15.64]It will also be visible across the Pacific Ocean into East Asia [01:21.72]as the moon rises Wednesday night into Thursday. [01:26.64]The U.S. East Coast, however, is out of luck. [01:31.16]The moon will be setting just as the eclipse gets started. [01:36.88]Europe, most of Africa and South America also will miss out. [01:44.36]A blue moon is a second full moon in one month. [01:49.47]It is rare enough that English speakers [01:53.32]use the expression "once in a blue moon" to describe something [01:59.16]that does not happen often! [02:02.28]A supermoon is a full or new moon. [02:06.96]It appears brighter and bigger than usual [02:10.44]because the moon is closer to the earth than usual. [02:15.50]In a total lunar eclipse, the Earth covers the moon's surface [02:21.46]with its shadow, giving it a red-like color. [02:26.40]For that reason, it is also known as a "blood moon." [02:31.72]Some people are calling this week's lunar event a "super blue blood moon." [02:39.00]Noah Petro is a scientist with the American space agency NASA. [02:45.60]He is calling the lunar event, "the Super Bowl of moons." [02:52.00]No matter the name, it is likely to impress if the skies are clear. [02:58.96]As the sun lines up perfectly with the Earth and then the moon for the eclipse, [03:06.80]scientists will make observations from a telescope in Hawaii. [03:13.52]They are also planning to collect information from NASA's [03:18.27]moon-circling Lunar Reconnaissance Orbiter. [03:23.48]Just as last August's total solar eclipse cooled the Earth's surface, [03:30.72]a lunar eclipse cools the surface of the moon. [03:36.04]It's this sudden cooling — from the heat of direct sunlight [03:41.16]to almost a deep freeze — that researchers will be studying. [03:47.48]And that's What's Trending Today. [03:50.24]I'm Ashley Thompson. [03:51.68]更多听力请访问51VOA.COM