The first spacecraft to visit Mercury was Mariner 10, which imaged about 45 percent of the surface. Mercury is … It’s not known who discovered Mercury. Mercury only has one sunrise every 180 Earth days! A large part of Mercury could be covered in dried lava. The planet Mercury is one of the most interesting parts of our solar system. Follow Live Science @livescience, Facebook & Google+. In 2008, 13 states introduced laws that limit the manufacture, sale and/or distribution of mercury fever thermometers: California, Connecticut, Illinois, Indiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, New Hampshire, Rhode Island, Oregon, Washington, the Environmental Protection Agency reports. NY 10036. As the closest planet to the Sun, there has always been and will always be a lot of mystery surrounding Mercury. Our first recordings of Mercury date back a few thousand years, though it’s very likely that humans noticed Mercury from the Earth long before that. Mercury has a very high surface tension, so it forms rounded beads of liquid. Mercury has no atmosphere and no known satellites, perhaps because of its proximity to the Sun.. 4. It completes one revolution around the sun in just 88 Earth days. However, recently many astronomers have come out and said that they do believe that there once could have been life on Mercury. Mercury has cliffs and valleys just like Earth. In recent years with space missions, we’ve actually managed to get a lot closer to Mercury than ever before, and we are learning more about this small planet. Most are small craters, while a few are more than 50 mi wide. You would need a very special spacesuit to visit Mercury. There is no water on Mercury. To extract pure mercury, the ore is ground up and heated to the temperature of about 1,076 degrees F (580 degrees Celsius) with oxygen present in the process. There are many facts about Mercury that are good to know, and we’ll take a look at the most fascinating ones in this article. Mercury has an atmosphere which is extremely thin. You will receive a verification email shortly. The inner core of Mercury is something that has fascinated astronomers for centuries. © The largest crater, Aneirin, is named after a 6th Century Welsh poet. In fact, Mars is the most likely planet that humans could live on, and it’s because it’s further away from the Moon! Astronomers believe that in the past, both planets had moons, but that the Sun’s immense gravity pulled them away. New York, Mercury likes to keep things simple. Mercury can form alloys with gold, silver, zinc and cadmium, which are called amalgams. The cores of smaller planets cool and solidify rapidly, but extensive research concludes that this is not the case for Mercury. A day on the surface of Mercury lasts 176 Earth days. It is the closest planet to the sun, but it’s actually not the hottest. This is instead replaced by a thin exosphere, made up primarily of oxygen, sodium, hydrogen and helium. These volcanoes may account for how the planet’s surface looks now. Mercury’s Neighbors. Mercury can form alloys with gold, silver, zinc and cadmium, which are called amalgams. The only other liquid element under standard conditions is bromine (a halogen ), although the metals rubidium, cesium, and gallium melt at a temperature just above room temperature. The planet Mercury is actually made up primarily from Iron – it’s estimated that 75-80% of the planet’s core is made from iron, most of which is melted. The side of Mercury that faces the Sun experiences temperatures of approximately 427 °C, while the alternate side can be as cold as -173 °C. Mercury is a terrestrial planet. Mercury is only one of two planets without a moon – Venus is the other one. So a 200lb man would only weigh 76lbs on Mercury. It is small and rocky. Mercury and the Sun are nearly in a tidal lock, which has slowed the planet's rotation.
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