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
I Was a Satellite of the Sun is responsible for deadly radiation. Animated scenes explain orbital dynamics, auroras, solar radiation, and other scientific topics. The first panel reads: "In episodes" "Uncredited" I Was a Satellite of the Sun I Was a Satellite of the Sun - () Soviet feature dramatic science-fiction film of 1959 with animation elements. The story is told as an autobiography of the astronaut character Andrew, and set in the future, where space flight is common. Scientist/Astronaut Petrovich pioneers the way to the Sun, but his spacecraft is never heard from again. Later, Andrew's laboratory investigates means of protection from deadly radiation. Andrew repeats