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.
Actually that isn't completely true. The Kuiper Belt was discovered in 1992 by David Jewitt and Jane Luu when they found the first Kuiper Belt Object (KBO). Jan Oort discovered the Oort Cloud which is much farther out (50000 AU from the sun) than the Kuiper Belt (30-50 AU from the sun). The Kuiper Belt is named after astronomer Gerard Kuiper for his theories on an area in the solar system past Pluto where short-period comets derived from.