We’re just a day away from a new lunar phase, which means we’re close to seeing the moon half-lit up once again.
What is a lunar phase, you ask? Lunar phases make up the lunar cycle, a series of eight unique phases of the moon’s visibility. According to NASA, these different phases happen as the Sun lights up different parts of the moon whilst it orbits Earth.
Keep reading to see what you can see when you look up tonight, Sept. 28.
What is today’s moon phase?
As of Sunday, Sept. 28, the moon phase is Waxing Crescent, and according to NASA’s Daily Moon Observation, 36% of its surface is illuminated tonight.
There’s plenty to see tonight, so adjust your gaze and look upwards. With just your naked eye, you’ll see the Mare Crisium, Mare Tranquillitatis, and the Mare Fecunditatis. If you’re in the Northern Hemisphere, these are all positioned towards the right of the moon, from the middle upwards. If you’re in the Southern Hemisphere, look to the bottom left.
If you’ve got a pair of binoculars, pull them out to see the Posidonius Crater, the Endymion Crater, and the Mare Nectaris. With a telescope, you’ll see all this and the Apollo 17 and 11 landing spots and the Descartes Highlands.
When is the next full moon?
The next full moon will be on Oct. 6. The last full moon was on Sept. 7.
Mashable Light Speed
What are moon phases?
NASA tells us that moon phases are part of a 29.5-day cycle of the moon’s orbit. This changes the angles between the Sun, Moon, and Earth. Moon phases are how the moon looks from Earth as it goes around us; sometimes it looks full, sometimes it looks like it’s disappeared entirely, but we always see the same side of the moon, it’s just how much of it is lit up by the Sun that changes depending on where it is in its orbit.
This is how we get full moons, half moons, and moons that appear completely invisible. There are eight main moon phases, and they follow a repeating cycle:
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.
Last Quarter (or Third 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.
