 So, we call it a supermoon because the technical term pergy-siggy is kind of boring and complicated. But what it means is that sometimes the moon is further away from us and it varies by about 50,000 kilometers. And when it's further, it appears a little bit smaller and fainter. And when it's closer, it's a bit bigger and brighter. Now, the variation is about 30% what you can see with your eyes, but you really only notice it if you can compare the two moons next to each other. So the best time to see the supermoon is actually at sunset when that moon is rising above the horizon. Because even though their supermoon can occur at a new moon when we don't see it or a full moon, you only really want to see it when it's a full moon and a full moon always rises at sunset.