the cause is Carrots.
You see some aliens, probably called jeff and sue(they are always called jeff and sue).
Well they wanted some Carrots, they live in space where its dark so they need to see better, anyway they needed lots of carrots.
So they explored the galaxy till they found the perfect place to grow Carrots, using The Big Book of Space Gardening as a guide, it says the best place to grow Carrots is on a green and blue ball not too far away from a bigger orange ball, and for even better carrots, the green and blue ball needs to be surrounded by alot of green coloured glass, some may even call it a Greenhouse, but they world be stupid as The Big Book of Space Gardening refers to it as an cooglebumpfooter.