22 What planet is the hottest? The smallest planet in our solar system has a big presence in our collective imagination. astronomical unit (AU, or au), a unit of length effectively equal to the average, or mean, distance between Earth and the Sun, defined as 149,597,870.7 km (92,955,807.3 miles). WATCH: Sharks biting alligators, the most epic lion battles, and MUCH more. It turns so slowly that it completes three spins after it has done two full trips around the sun. Observers throughout history have attempted to measure the distance between the Earth and the Sun. If you lived on the tiny planet, you would host your birthday party four times per normal (earth) year. All steps. Based on PCM, Mercury is closer to Earth almost 50 percent of the time, with the remainder split between Mars and Venus. The same thing happens in reverse at sunset for other parts of the surface. An artistic interpretation of Curiositys view high up on a Martian mountain was created by mission team members. Distances of the Planets From the Sun in Light Years Light years measure the distance light is able to travel in the span of one Earth year. JPL's lucky peanuts are an unofficial tradition at big mission events. Only MESSENGER has ever touched the surface; however, that was not a landing but rather a crash at the end of its mission. Light years measure the distance light is able to travel in the span of one Earth year. This was the first spacecraft to ever visit the planet, arriving on March 29, 1974. But only a few spacecraft have traveled to it. Mercury has a solid, cratered surface, much like the Earth's moon. Design & Development: One Mercury solar day (one full day-night cycle) equals 176 Earth days just over two years on Mercury. Mercurys orbit is 36 million miles (57.9 million kilometers) away from the sun on average. Mercury does not have a normal atmosphere (with air or clouds) which explains why it achieves freezing temperatures on the side hidden from the sun despite being so close to the sun (cannot trap heat). It is defined to be exactly 1.00 for the Earth-Sun orbit distance, and we call this distance 1.00 AUs. The smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's Moon. The given west direction from Earth is only approximate. How Far Away is Mercury from the Sun and Earth? - Love the Night Sky
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