The open cluster M25 can sometimes find itself behind some of the planets in our solar system on the sky. This was the case in 2012, when the dwarf planet Pluto passed near the cluster!
Again I keep GOmens posting, but it's so hard to explain the plot of five minutes of this show and not sound like you're mad. Here is exactly what I said to my family about the M25 bit:
Me: "I find it kinda funny that in the season finale the M25 turns into a giant ring of hellfire."
My dad: "It already is a ring of hellfire."
Me: "No like literally. And then the demon drives his 90 year old Bentley through it, somehow survives, and makes the coolest entrance into the next scene in a flaming Bentley."
Prophecy 2213 - "Four shalle ryde and three sharl ryde the Skye as two, and Wonne shal ryde in flames; and theyr shall be nostopping themme: not fish, nor rayne, neither Deville or Angel. And ye shalle be theyr also, Anathema."
This unnamed open cluster is about 2,000 light years from Earth and contains about 600 known members. It is also not particularly young, with an age estimated to be about 67 million years old. In other words, this cluster came into being right before the dinosaurs died out!