"Troyan" satellite of Uranus and other interesting facts about the "fellow travelers" of this planet
It would seem that our solar system has long beenwell studied, and it's time to go to explore other worlds. But it was not there! It turns out that nearby the Earth you can also find interesting surprises. Proof of this is the recent discovery of Canadian astronomers from the University of British Columbia in Vancouver. It was they who discovered the unique "Trojan" satellite of the planet Uranus, which later received the name of the 2011 QF99. By the way, in 2010, near the Earth, the first asteroid of this type was also found. Its name is 2010 TK7, and the diameter is three hundred meters.
What are the interesting "Trojan" asteroids
This kind of celestial bodies got its namebecause its representatives have a curious feature: they are located in the same orbit as the planets themselves, which are directly in their vicinity, and the probability of their collision is practically zero. Such stability is associated with a special arrangement of the orbits of the "Trojans": they necessarily pass through the Lagrange points, in which the forces of gravity mutually balance each other.
It should be noted that the Canadians' open satelliteUranium is the only one of its kind, since until this time many astrophysicists believed that near the cosmos cosmic bodies of this kind can not be in principle. In their opinion, the gravity of other space objects in this part of our solar system will inevitably push the "Trojans" from their orbits. Nevertheless, the new satellite of Uranus is not going to leave its current location. We add that the diameter of this object in the cross section is 60 km, and the main components are ice and such rocks that are often found in comets.
Other "companions" of the azure giant
Each satellite of Uranus, as indeed the planet itself,Rotates in an orbit almost perpendicular to the plane of the ecliptic. They are not so little in Uranus. To date, astrophysicists have discovered five large and about a dozen small satellites of this planet. The brightest of them is Ariel. His opposite - Umbriel, on the contrary, is darker than all its neighbors. Titania, as one can guess from the name, is the largest satellite of Uranus. There are many valleys and faults on its surface and an infinite number of craters. The diameter of this satellite is 1580 km. Miranda is the most enigmatic space traveler. The latter surprises many with its structure: it seems as if it consists of four or three gigantic stone boulders. Closes the top five Oberon - the second largest and largest satellite of Uranus. Scientists knew about these space objects even before the first images from Voyager-2 were received. Thanks to this device, people learned about the remaining ten satellites, two of which serve as a kind of "shepherds" for the rings, just as Saturn does.