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None. The planet had been observed by ancient astronomers by the 14th Century BC - so almost 3,500 years ago. Thus Mercury had been discovered a very long time before the first satellites were even dreamt of.

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9y ago

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Name the planet left to right?

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.


How do you discover a new continent?

There are 7 continents. There are none left to discover.


What is left to discover in the polar regions?

We do not know. That it is why it is left to be discovered!


What is the planet mercury's stripe?

The large stripe you may see on some photos of Mercury may be from missing data. As of now, they still didn't photograph the planet completely, close up. Though, NASA's Messenger Spacecraft is there now and it is sending back new photos. The smaller stripes you might see may be caused from a number of things, such as stress fractures from quakes or impacts. Some things on Mercury they haven't been able to explain, to any satisfaction. Hexagon shaped craters, a "Telephone" shape on one crater... There is much to be discovered, there, as it is with all of the planets of our Solar System. Keep looking to discover new things for yourself. Sometimes, the secrets in outer space are left for you to find.


Is Mercury a gassy planet?

Mercury is a rock planet; it is solid. Any planet to the left of the asteroid belt (Mercury, Venus, Earth and Mars) are rock planets, or terrestrial planets, while any planet to the right of the asteroid belt are gaseous (Jupiter, Saturn, Neptune, Uranus).


When did Mercury get craters?

Each crater on Mercury was left behind by an asteroid or comet that collided with it. Many of the craters are nearly as old as the planet itself, as collisions were far more common when the solar system was young. Other craters may only be a few million years old.


Which is the next planet after Uranus?

Going outwards from the sun the planet Neptune comes after Uranus.Remember:Mary Very Easily Makes Jam for Mercury, Venus, Earth, Mars and Jupiter; andS-U-N for Saturn, Uranus and NeptunePoor Pluto is left (as before) out in the cold -- and isn't even a planet anymore.


What are some facts about Mercury?

Mercury, the planet. Mercury is the second smallest planet in the solar system, the smallest is Pluto. It is the closest planet to the sun; it is known as an inner planet. Its speed helps pervent it from getting sucked into the sun. It orbits round the sun in about 88 earth days but takes 58 earth days to rotate once. Mercury has no atmosphere so it is a poor place to live. Mercury, the element Mercury is a highly toxic element. Humans exposed to mercury can die from mercury poisoning. All old oral and rectal thermometers contained a cylinder of mercury; kids at home and in chemistry class used to deliberately pour out mercury to 'play' with it because mercury always splits into small balls that join and split from the main body of mercury in whatever amount. At the time, the health risks of being exposed and touching mercury were not known as they are known today. Today, oral and rectal thermometers are digital and do not contain mercury. In the past, old thermometers were put in trash and trucked to landfills with all other garbage. This left small areas of contamination in the soil and ground water. Mercury must be disposed of as toxic waste; most health departments can take old thermometers for appropriate disposal. Industries that contaminate the waters can cause fish to carry high levels of mercury. If humans eat the contaminated fish, it can lead to mercury-related illnesses.


How many Elmo's are left in this planet?

There is no such thing as an Elmo except on Sesame Street. So,therefore,the answer is that there are no Elmos left on the planet.


Mercury's evolution was different from the Moon's because?

Mercury is a planet, whereas the Moon is Earth's natural satellite. Mercury has a metallic core and a thin atmosphere, while the Moon has no atmosphere and is composed mainly of rock. Additionally, Mercury has undergone geological processes such as volcanism and tectonics, while the Moon's surface has remained largely unchanged for billions of years.


What is the planet Mercury made from?

Mercury was formed as with all planets in our solar system by accretion. As the proto planets orbited the Sun, asteroids and other stellar stuff were attracted by the now growing mass of Mercury, adding to it's mass and thus it's gravity. It drew more and more interstellar material until there was little left to absorb. However, another proto planet about the same size as Mercury was in the same orbit as Mercury and they collided. This "merger" ejected the lighter elements out into the Solar System, whilst the heavier elements combined, giving Mercury is current massive iron core.


How do you remove mercury from a mixture?

by heating mercuric oxide oxygen will evaporate and mercury will be left in the flask