A photon is an elementary particle, the quantum of light and all other forms of electromagnetic radiation. It is the force carrier for the electromagnetic force, even when static via virtual photons.he energy of a system that emits a photon is decreased by the energy of the photon as measured in the rest frame of the emitting system, which may result in a reduction in mass in the amount. Similarly, the mass of a system that absorbs a photon is increased by a corresponding amount.
THE SOLAR SYSTEM WIKI. Pluto. 134340 Pluto, more commonly known simply as Pluto, is the second-largest known dwarf planet in the Solar System, and the tenth largest observed body directly orbiting the Sun. It orbits between 29 and 49 AU from the Sun, and was the first Kuiper Belt object (KBO) to be discovered.
Some astronomers think the Kuiper Belt goes out to 100 AU. KBOs take 200 years or longer to orbit the Sun! Some astronomers had a theory about the Kuiper Belt in the early 1900s. One of them was Gerard Kuiper. In 1951, Kuiper said that some kinds of comets might come from the Kuiper Belt. The Kuiper Belt was named after Gerard Kuiper. The first KBO was discovered in 1992. It was given the odd name 1992 QB 1 . The planet Pluto is also a Kuiper Belt Object. There are probably a bunch of other KBOs as big as Pluto or bigger that we haven't found yet.