Sunday's supermoon will be biggest and brightest full moon this year

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During its orbit, the moon passes through two points: Perigee and apogee.

For the first and last time in 2017, a supermoon will grace the skies on Sunday, Dec. 3.

The moon's average distance from the Earth is approximately 238,000 miles.

The year's biggest, brightest supermoon is set to grace OR skies this Sunday.

That's because the timing has to be just right. If the moon is a bit bigger and brighter, even better.

December Full 'Cold Moon,' First and Only Supermoon of 2017, to Be Visible Sunday Night

According to Michelle Nichols, director of public observing at Chicago's Adler Planetarium, there is a reason behind the moon's captivating close approach to the Earth. It's more like an oval, so at times it's closer to the Earth than it is at other times.

It can also shine up to 30 percent more moonlight on the Earth, NASA says.

The distance between the moon and Earth constantly changes.

We had a total solar eclipse, several meteor showers, and now a supermoon in December.

The astronomical term for a supermoon is "perigee syzygy". The effect makes the celestial body appear larger and brighter.

When can I see the supermoon?

Guess what: It's supermoon time!

This optical illusion also occurs when watching the supermoon immediately after sunset (or before sunrise). This is also why both times are the best for watching the supermoon. The moon should sit near the constellation Taurus, though it shouldn't be hard to spot. The moon will appear about 7 percent bigger and 16 percent brighter than average.

This supermoon won't be quite as special as last year's.

"Tap the screen and hold your finger on the object (in this case, the moon) to lock the focus".

This Sunday is your chance to get up close and personal with the Moon.

Photos of the November 2016 supermoon elicited oohs and aahs in clear skies from Beijing to Baikonur, Kazakhstan.

Bigger and brighter than a typical full moon, the term "supermoon" was coined in 1979 by astrologer Richard Nolle. The supermoon will still be great as it traverses the sky. Do it near the horizon, and do it again away from the horizon.

If you're taking pictures, please post them on Twitter, Instagram and Facebook using the hashtag #CNNWeather.