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.
by Fraser Cain on November 27, 2009. Even in ancient times astronomers knew of 5 planets: Mercury, Venus, Mars, Jupiter and Saturn. But it wasnât until the last few hundred years that the next planet was finally discovered â Uranus.So when was Uranus discovered? Uranus was found on March 13th, 1781 by Sir William Herschel of England.Uranus, seen by Voyager 2. Image credit: NASA/JPL. You might be surprised to know that Uranus is actually bright enough to be seen with the unaided eye.e thought he might have found a nebular star or a new comet. When he presented his findings to the Royal Society, the Astronomer Royal Nevil Maskelyne discovered that it actually had a planet like orbit and didnât seem to posses a tail. It was the first new planet discovered in history.