No, Earth's spacecraft have visited Mercury, but no person has ever gone into orbit around Mercury, let alone trod on its surface. The temperatures on Mercury, on the other hand, are substantially higher. Mercury's equatorial surface temperature climbs to 700 Kelvin during the day (427 degrees C). At night it drops to 400 Kelvin (273 degrees C). This is more than twice as hot as the surface of Mars, which is about 300 K at its warmest point.
Mercury is also much closer to the Sun than Earth. So even if you were able to build a spaceship that could survive these conditions, you would still need solar panels to collect energy from the Sun. Solar power is one option for supplying electricity to propel yourself through space. But here on Earth we use fuels derived from organic material which was previously living organisms - plants for fuel and air conditioning, and animals for meat. There is no known source of energy on Mercury that could support life; therefore it cannot sustain any form of intelligent life.
The closest any body has come to Mercury is 10,000 km away where the Moon's influence can be seen with the naked eye. This is close enough to experience 1/6th of the Moon's gravity, but not close enough to travel in an orbit round Mercury like the Earth does around the Sun.
Astronauts train for missions by going to places like ISS where they can practice working in microgravity and with different environments.
Have any Earth-based astronauts ever set foot on Mercury? What would it take to go to Mercury? For a human being, nothing less than reaching the end of Earth's gravity well and entering into that of Mars.
So far, only one mission has succeeded in doing so: The United States' Mariner 9 spacecraft made three passes between January and March 1973 at distances ranging from 350 to 1,450 miles (560 to 2,440 km) from the planet's surface. The spacecraft returned images of the global landscape that revealed many features never seen by previous missions or even imagined possible until then, including large volcanic calderas and wide-open spaces occupied by few if any rocks.
These discoveries prompted scientists to revise their ideas about how planets are formed and evolve. They now know that Mercury is much younger than previously thought, having been almost entirely vaporized by the Sun before it had time to develop an atmosphere or magnetic field. It also shows signs of recent geologic activity through the production of volcanoes and lava flows.
Venus is the second planet from the Sun and the one most often referred to as the Earth's twin.
However, because the surface tension of mercury is only 7 times that of water, it is implausible that a human could walk or run on mercury without breaking the surface tension (unless it is possible to devise some snow-shoe like contraption to increase the lift provided by surface tension). A small amount of dust may be able to settle on the skin, but nothing more.
Mercury has been used in laboratory experiments as a substrate upon which bacteria can grow. It has been demonstrated that certain strains of bacteria are capable of growing in medium containing concentrations of mercury higher than those tolerated by most other organisms. However, these studies did not involve exposure for periods longer than several hours at a time, so they do not indicate any hazard from regular contact with mercury over many years.
The U.S. Environmental Protection Agency recommends that people avoid absorbing mercury through their skin. Although it is unclear whether individuals would absorb enough mercury to be affected by it, children, pregnant women, and others should avoid contact with elemental mercury because it could enter the body through small cuts or abrasions on the skin.
People who work with elemental mercury every day should take special precautions against inhaling it. The main danger comes from the brain and lungs; the blood contains little mercury, so there is no need to worry about poisoning someone else with your blood.
Mercury is not an easy planet to thrive on, but it is not impossible. It's worth mentioning that without a space suit, you wouldn't last long owing to a lack of atmosphere. Furthermore, Mercury experiences one of the biggest temperature variations in the solar system. From -300 degrees Celsius at night to more than 300 degrees during the day. This can also cause problems for organisms that rely on daily cycles of heat and cold for their existence.
However, even though there is no air to breathe, humans have developed ways to cope with the effects of mercury exposure. The most common way is by using protective equipment such as rubber gloves when handling substances that may contain mercury. Other methods include avoiding contaminated food products or using chemical filters to remove some of the contamination from the air.
In conclusion, yes, humans can survive on Mercury if they use proper protection and avoid sensitive activities such as dental work.
Mercury's orbital parameters Mercury's oval-shaped orbit is very elliptical, putting it as near to the sun as 29 million miles (47 million km) and as distant as 43 million miles (70 million km). A unusual transit of Mercury occurred in 2016, when the planet crossed the face of the sun. This caused its atmosphere to evaporate, darkening its surface and creating a visible trace on Earth with instruments capable of detecting such a change.
Yes, but not during a direct pass like Earth does. Rather, the closest approach occurs when Mercury is on the opposite side of the sun from Earth. At this time, the distance between Earth and Mercury is about 3.9 million miles (6.4 million km), or about half the distance between Earth and the moon. As a result, only part of Mercury's surface is exposed to sunlight. The amount of darkness increases as you go farther from the center of the planet - almost all of Mercury is bathed in sunlight at the farthest point out from the sun.
During a transiting event, observers on Earth see a small decrease in brightness as Mercury passes through the disk of the sun. The effect is most noticeable just before sunrise or after sunset when the planet is high in the sky and easily seen with the unaided eye. Transits are also seen by pointing a telescope towards Mercury; however, because it takes several hours for Mercury to cross the sun's face, observing them isn't easy.