International Ultraviolet Explorer was considered the most successful astronomical satellite ever. The human eye can perceive light with wavelengths between roughly 350 (violet) and 700 (red) nanometres. Ultraviolet light has wavelengths between roughly 10 nm and 350 nm. UV light can be harmful to human beings, and is strongly absorbed by the ozone layer. This makes it impossible to observe UV emission from astronomical objects from the ground. Many types of object emit copious quantities of UV radiation, though: the hottest and most massive stars in the universe can have surface temperatures high enough that the vast majority of their light is emitted
The Secret Saturdays: Beasts of the 5th Sun 4 suns already and we live under a 5th sun or as he calls it the "Sun of the 8 Beasts". According to the Aztecs there will never be a sixth sun and closes with "Are you afraid of the dark NOW." Mere moments later, the Screens flash intruder alert and Drew tells Zak to stay but Doc asks that he helps check out the place. Using Cryptids that had broken into the facility specifically a Cafre and Fiskerton to fight off some of Argost's minion's. Shortly thereafter Zak fights a Kingstie as a mini boss followed by Van Rook