What is this alien world? Believe it or not, it’s our very own Moon. International Observe the Moon Night takes place this Saturday, 26 September. Whether by using a telescope, taking photos of the night sky, joining a virtual event, learning about our planet’s natural satellite, looking at images of the Moon, or just going outside and looking up, there are lots of ways you can join in on the lunacy. Plus, we’ve put together an explanation of the fascinating phenomenon of why the Moon appears upside down or even sideways depending on where you are and what time it is.