Algebra I For Dummies
Book image
Explore Book Buy On Amazon
This year will see four lunar eclipses happen, two of which will be total lunar eclipses. The first will happen on May 15 and will be visible from North America, except in northwestern regions. The moon will enter the penumbra (the lighter, outer part of the earth’s shadow) at 9:31 p.m. EDT on May 15 (6:31 p.m. PDT) and leave it at 2:52 a.m. EDT on May 16 (11:52 p.m. PDT on May 15).

phases of a lunar eclipse ©Matteo Grassi /

The second total eclipse will be on November 8. This eclipse will be visible from North America, although the moon will be setting during the eclipse for observers in eastern regions. The moon will enter the penumbra at 3:01 a.m. EST on November 8 (12:01 a.m. PST) and leave it at 8:58 a.m. EST (5:58 a.m. PST).

What is a lunar eclipse?

A lunar eclipse is the cousin to a solar eclipse, albeit much less dramatic. Still, it makes for a great experience. As the full moon passes into the earth’s shadow, the moon can appear to darken and then change color, turning a dark red.

This is because the sun’s light gets bent (refracted) through the earth’s atmosphere. The red light gets bent the most, so that’s the light that illuminates the moon’s surface during a lunar eclipse. You could think of it as the light from every sunrise and sunset on Earth lighting up the moon’s surface!

For more mind-bending astronomy facts about the moon and other celestial bodies, check out Astronomy For Dummies.

two people stargazing ©Mark de Jong /

Stargazing a lunar eclipse

Despite two total lunar eclipses happening this year, they aren’t very common. But two things make them easier for you to observe than solar eclipses:
  • When a lunar eclipse happens, it’s often visible from anywhere on the night side of the earth.
  • Lunar eclipses are safe to observe with your eyes, binoculars and telescopes.
Want to learn how to best explore the distant wonders of the night sky? Stargazing For Dummies offers readers a detailed starter guide for the future stargazer.

While you wait for the first lunar eclipse of the year, here's some interesting information about the moon's significance in world culture.

symphony rehearsing ©Manuel Nägeli /

The moon in classical music: From Beethoven to Chopin

Did you know classical music has a few sub-genres dedicated entirely to capturing the moon’s natural beauty and emotive characteristics?

For example, you’ve likely heard of Beethoven’s Moonlight Sonata or, perhaps, Debussy’s Clair de lune. These timeless pieces of music take their listeners through a moonlight-draped journey full of evocative passages, foreboding moments and somewhat mysterious tones — all inspired by that lonely white marble above.

Chopin’s Nocturnes are another great example. As their name suggests, these are compositions centered entirely around the moon, nighttime, and dreaming.

For more on classical music and its many timeless compositions, check out Classical Music For Dummies.

zodiac symbols on a building facade ©Micky White /

The Moon in astrology: Emotions, instincts and habits

Of course, no discussion about the moon would be complete without mentioning its significance in Western astrology. And yes — there’s more to it than the 12 zodiac signs.

The moon's nodes, for example, refer to where its path crosses the ecliptic, which is the apparent path of the sun among the constellations over the course of a year. The north or ascending node marks the place where the moon crosses from south to north, seemingly ascending through the sky. The south, or descending node marks where the moon crosses from north to south, descending through the sky.

What does this mean for astrologers? Without getting into the nitty gritty details, the moon is often associated with the “emotional self” in our astrological charts, and can represent the mysterious, hidden, and spiritual self in the tarot.

To learn more about the moon’s significance in Western astrology, check out Astrology For Dummies.

About This Article

This article is from the book:

About the book author:

Mary Jane Sterling taught algebra, business calculus, geometry, and finite mathematics at Bradley University in Peoria, Illinois, for more than 30 years. She is the author of several For Dummies books, including Algebra Workbook For Dummies, Algebra II For Dummies, and Algebra II Workbook For Dummies.

This article can be found in the category: