A moon is a natural satellite rotating around a planet. Many people think that the answer to ‘what is the largest moon in the Solar System’ is our Moon. It is not. Our Moon is the fifth largest Moon in the solar system. Let’s explore the moons of the solar system. The below is the top 10 largest moons in the solar system.
The Moon has phases because it orbits Earth, which causes the portion we see illuminated to change. The Moon takes 27.3 days to orbit Earth, but the lunar phase cycle (from new Moon to new Moon) is 29.5 days. The Moon spends the extra 2.2 days “catching up” because Earth travels about 45 million miles around the Sun during the time the Moon completes one orbit around Earth.
On the South Pole the Moon will be the first space observatory. Two private companies are engaged in implementation of the project of colonization of Moon. The first space observatory mission to the South Pole of the Moon is planned for 2016. Two private companies International Lunar Observatory Association (ILOA) and Moon Express decided to establish on the edge of a crater Malapert, which height makes five kilometers, a two-meter radio antenna and a small optical telescope. Need of this expensive project — and it will manage in $100 million — is caused by several factors. Data which will be provided by space observatory will be much more exact, than the data obtained by land and even by space observatories. The idea to place a telescope on a dark side of the Moon appeared at people for a long time. In Selena’s this part of a hindrance to devices aren’t terrible: the probability of emergence of background noise is minimized.
On July 5, 2013 it was confirmed about existence of one more, 14th satellite of the last planet of Solar system – satellite of Neptune. The picture from the Hubble telescope shows recently opened companion of the Neptune at number S/2004 N1. The black-and-white picture was made in 2009 the Hubble telescope and a color picture of the Neptune in August, 2009. Thanks to new opening of this satellite, the number of the known moon round the last planet increased to fourteen. According to preliminary estimates scientists, diameter of the new S/2004 N1 satellite of Neptune is equal 16-20 km that is the smallest today the known companion of the Neptune. It so dim and small in a size that it is weaker approximately in 100 million times of the most dim star which the person can see with the naked eye. At Voyager-2 spacecraft flight by a planet in 1989, he couldn’t find this satellite. The author of opening Mark Showalter from Search for Extraterrestrial Intelligence/SETI/ could find this satellite during research of arches, and as segments round the Neptune. For its search there were used about 150 archival pictures of the Neptune, which were made by the Hubble telescope during the period from 2004 to 2009.
On June 23 fans of the nature observed the colorful astronomical phenomenon – the supermoon. This day being in the full phase Moon passed a perigee. By data, the distance of the supermoon made 356 991 kilometers that on 27 thousand kilometers is closer, than usually. At this time the visibility of a disk of the Moon was 14% higher, and reflective ability grew by 30%. During the next supermoon it will be possible to observe star approximations to Earth on August 10, 2014. The “SuperMoon” term is very young – for the first time it applied to the characteristic of a perigee, which passed in the spring of 2011. The similar phenomenon is observed each one and a half years and is capable to cause different natural disasters or even unusual behavior of people. However, the majority of scientists is rejected by such assumptions and calls them prejudices.
After completion of Grail Nasa mission, scientists had an opportunity to study the Moon mascons. When last year two space twin devices finished the mission on studying of gravitational fields of the Moon scientists had a chance to learn more about the Moon mascons. Mascons are in abbreviated form concentration of weight. According to scientists of Grail Nasa mission, they are regions of a lithosphere of a planet or the natural satellite, causing positive gravitational anomalies. Mascons were found and localized on indignations in movements of artificial satellites of the Moon. Most often mascons are located under the lunar seas having a roundish form.
Found new research, that twenty five percent of lunar craters can store the remains of asteroids, which created them. The surprising result allows to assume that it is necessary to scientists a little more difficult, than they expected to find out, from what the Moon consists. By the words of coauthor of research Jay Melosh from University of Pardyyu future researches of structure of the lunar soil should work to prove that breeds on a surface really lunar, instead of arose owing to falling of the asteroids, especially unusual or exotic minerals. Melosh and his colleagues used computer models for imitation of formation of lunar craters from collision with asteroids. They defined that one quarter of craters on the Moon were left the asteroids flying with a speed of 26 800 miles/h (43 130 km/h) or less – improbably quickly, but not quickly enough that the asteroid was destroyed. Other calculations executed by team, show that at such speeds the asteroid doesn’t evaporate, and many its parts remain in the formed crater. If diameter of a crater not less than 20 kilometers, the remains of an asteroid tend to collect in the central dive of a crater, gradually collapsing under the influence of gravitation of the Moon.
On May 22 we will be able to observe bright and quite unusual occurrence when planet Saturn will come nearer to the Moon. This week is really full interesting astronomical of events. So, besides, that this week Mercury, Venus and Jupiter will gather on the evening sky in the form of a triangle with the parties about 2 degrees, we also will be able to observe rather bright planet Saturn near our natural satellite. Today the Moon enters a full moon phase. It will approach with Saturn as much as possible and “will concern” bottom edge of northern border of a terrestrial penumbra. Then will pass through zodiac constellations of the Lion, the Maiden, Scales, the Scorpion and the Sagittarius, possessing night visibility.
The Moon had a new crater on a surface thanks to a meteorite, which crashed into it in March, having arranged the largest explosion recorded by scientists from the moment of the beginning of its monitoring. The meteorite fell on March 17, having crashed into a lunar surface at a stunning speed of 56 000 miles/h (90 000 km/h) and having created a new crater of 65 foots in width (20 meters). Accident was accompanied by bright flash of light, which would be visible to any even with an unaided look. On March 17, the object of the size of a small boulder got to a lunar surface. It exploded in a flash, flash was nearly 10 times brightest which the scientists observed.