By: Sharise Cunningham|Updated: Jul 26, 2023
You probably know that the sun rises in the east and sets in the west. Well, so does the moon — most of the time. Technically, the moon rising can actually vary depending on the phase of the moon and the time of the year, according to the Farmers' Almanac. That means it could rise in the east-northeast or east-southeast, and it could set in the west-northwest or west-southwest.
But think of those times when you've seen the moon up in the late afternoon sky, just before sunset. That happens because of the tilt of the Earth and its position to both the sun and moon. We can see them simultaneously, but not necessarily as one sets and the other rises. So, is it ever possible to witness the moonrise at exactly the same time as sunset? The short answer is, yes.
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The Long Answer
The best chance to witness the phenomenon is when the moon is full nearest the vernal (spring) and autumnal (fall) equinoxes. That's because the moonrise is closest to due east and sets closest to due west on those dates. When the moon is full at these times of year, it's just about directly opposite the sun in the sky as it sets.
So, during these times of year, as you watch the sun setting on one side of the Earth, simply turn around and you might see the full moon rising behind you. They're not technically happening at exactly the same time, but from your vantage point as a mere mortal on Earth, it appears to be so. Plus, you're really witnessing THREE astronomical events: sunset, moonrise and a full moon.
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The best place to watch this happen — or any nighttime astronomical event — is from a location that has limited light pollution. You can search for an IDA Dark Sky Place — many exist around the world. These include communities, parks and areas that encourage and protect dark light and dark skies.
As of January 2022, there were 195 around the world, with several Dark Sky Certified Communities in the United States alone, ranging from Indiana to five in Arizona (Flagstaff, Sedona, Cottonwood, Fountain Hills and Oak Creek Canyon). Utah has one Certified IDA International Dark Sky Community, but, more impressively, it does have the highest concentration of Dark Sky Parks. The tiny island of Niue in the middle of the South Pacific Ocean is even the world's first "Dark Sky Nation." If you can't get to an IDA Dark Sky Place, just try to head outside of the big city to any place that has little light pollution.
The best time to see the moonrise and sunset at the same time will vary depending on your location and the time of year, and when the next full moon appears on the calendar.
Now That's Interesting
Did you know that just like hurricanes, every full moon has a name? You've probably heard of Harvest Moon, Blue Moon or Blood Moon. But what about Worm Moon, Buck Moon or Sturgeon Moon? Monthly moon names originate from Native American culture. Their names and meanings helped tribes keep track of the seasons. Hint: Worm Moon refers to worms appearing as the cold earth thaws.
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Sunset and Moonrise FAQ
Why doesn't the moon rise and set at the same time?
The moon rises and sets at different times because the Earth's orbital speed isn't consistent.
Is it possible to see a full moon and the sun at the same time?
The moon orbits around Earth, and Earth orbits around the sun, so it is possible to see the sun and the moon at the same time, though it's not very common.
Does the moon always rise at sunset?
No, the Moon does not always rise at sunset. The Moon's rise and set times vary throughout its monthly cycle, known as a lunar month, which lasts approximately 29.5 days. The new Moon always rises near sunrise, though is rarely clearly visible from Earth. The first quarter Moon rises around noon, the full Moon rises near sunset, and the last quarter Moon rises near midnight.
What does it mean when the sun and the moon rise at the same time?
This occurrence, which happens roughly once a month, is called the New Moon and happens because of the rotation of the Earth.
Is it possible to see a full moon and the sun at the same time?
It is possible to see a full moon and the sun simultaneously, but it's very uncommon and requires specific conditions to occur.
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