Interesting facts about Planet Mercury

Mercury

Mercury has no natural satellites however in the early 1970s astronomers thought it might've had a moon. Instruments onboard NASA's Mariner 10 spacecraft detected large amounts of ultraviolet radiation that some astronomers thought was radiation coming from a celestial body orbiting mercury it was later discovered that what was detected was actually a distant star.
Lonely planet mercury has water ice on its surface the idea of water ice being discovered on Mercury's surface may sound surprising given that it is the closest planet to the Sun but it has been detected using earth-based radar imaging and confirmed by NASA's messenger spacecraft the only locations on the surface where this is possible seems to be near the poles where the flaws of some craters might be deep enough to permanently shade the ice. Scientists believe that the ice got there either by meteorite bombardment or planetary outgassing. Mercury has more craters and impact marks than any other planet.
Mercury is very similar to the moon in that it is covered in deep craters the scarred surface unlike most planets it isn't geologically active it does not have much of an atmosphere this means that craters can be preserved throughout time without being eroded away like most of the old craters on Earth. The largest crater on Mercury is the Caloris Basin which is around 960 miles in diameter and was discovered by NASA's Mariner 10.
 Mercury owns the biggest man-made crater in space in 2014 NASA's messenger probe ran out of fuel after orbiting mercury for around 4 year. Because the probe could no longer correct its course NASA used spacecrafts last reserves of helium gas coolant to steer the messenger out of orbit and on a collision course with Mercury's surface it began to get closer to the planet and rapidly pick up speed eventually in April 2015 the messenger probe smashed into the surface of mercury at a speed of 8750 miles per hour creating a 50-foot wide crater. This explosive scar is the biggest man-made crater anywhere in the universe. Mercury is the least explored planet as of 2015. Mercury is the least explored inner planet within our solar system so far only the Mariner 10 and messenger missions have been sent to make close observations of the mysterious planet. In 1973 Mariner 10 was launched by NASA to make multiple flyby encounters of Venus and Mercury. Mariner 10 provided the first detailed data of mercury mapping 40 to 45 percent of the surface then more than 30 years later the messenger spacecraft was sent its instruments yielded significant data including a characterization of Mercury's magnetic field and the confirmation of water ice at the planets North Pole plus much much more the next mission to mercury will be launched in 2017 and it's consisting of two satellites each designed for a distinct purpose.