The moon is shrinking in visibility each night as we inch closer towards the New Moon. In just a number of days we won't be seeing anything when we look up in the sky, but at least for now, keep reading to see what you'll be able to spot tonight.
What is today’s moon phase?
As of Sunday, Dec. 7, the moon phase is Waning Gibbous. This means 90% of the moon is lit up tonight, according to NASA's Daily Moon Observation.
It's day 17 of the lunar cycle and you don't need to be equipped with any visual aids to be able to see anything. In fact, with just you naked eye you will be able to see the Serenitatis and Tranquillitatis mares. If you do have a visual aid, binoculars will allow you to see the Gassendi Crater, Endymion Crater, and the Apennine Mountains. And a telescope will help you see the you can catch a glimpse of the Apollo 12 landing spot, Rupes Altai, and the Linne Crater.
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When is the next full moon?
The next full moon will be on Jan. 3.
What are moon phases?
NASA explains that the lunar cycle (which is about 29.5 days long) is made up of the Moon’s phases, which describe how the Moon looks from Earth as it travels around us. We view the same side of the Moon at all times, but the sunlight hitting its surface shifts as it moves through its orbit. That changing illumination is what makes the Moon appear full, half-lit, or not visible at all. The cycle includes eight distinct phases:
New Moon - The moon is between Earth and the sun, so the side we see is dark (in other words, it's invisible to the eye).
Waxing Crescent - A small sliver of light appears on the right side (Northern Hemisphere).
First Quarter - Half of the moon is lit on the right side. It looks like a half-moon.
Waxing Gibbous - More than half is lit up, but it’s not quite full yet.
Full Moon - The whole face of the moon is illuminated and fully visible.
Waning Gibbous - The moon starts losing light on the right side. (Northern Hemisphere)
Third Quarter (or Last Quarter) - Another half-moon, but now the left side is lit.
Waning Crescent - A thin sliver of light remains on the left side before going dark again.
Lois Mackenzie is a freelance reporter at Mashable. Over the years she has written for many publications, covering everything from the local news to the best pair of running shoes. You can find bylines in publications including Fit&Well, Metro, and Coach magazine, usually covering deals on everything from earbuds to TVs, or guides on how to beat your half marathon time.
Lois also holds a Master's degree in Digital Journalism from Strathclyde University and obtained a Master of Arts in English Literature at the University of Aberdeen.
