There are millions of asteroids from which some of them is dangerous uniquely. A potentially hazardous object (PHO) is a near-Earth object with an orbit that has the potential to make exceptionally close approaches to the Earth. It is also of a size large enough to cause significant regional damage in the event of impact. Astronomers indicate that between 37,000 and 78,000 tons of solar system debris hit Earth each single year. Fortunately, they usually rain down in tiny pieces that burn up in the atmosphere. Now, we’d like to call you attention introducing top 10 dangerous asteroids.
What do you think are there aliens living on the cigar-shaped asteroid Oumuamua? To find out the astronomers in the outback of Western Australia used the Murchison Widefield Array telescope to eavesdrop on the rocky visitor. They found out “We found no such signals with non-terrestrial origins,” the researchers wrote in the paper. Scientists learned about the mysterious, reddish space rock last year when it was spotted by the Pan-STARRS1 telescope in Hawaii in October.
The US space agency said “The space rock will shave safely by Earth at around 5:30 pm”. It will remain about 39,000 miles (64,000 kilometers) from Earth, which is less than one-fifth the distance to the Moon.“Asteroids of this size do not often approach this close to our planet — maybe only once or twice a year” : said Paul Chodas, manager of the Center for Near-Earth Object Studies at NASA’s Jet Propulsion Laboratory. According to the NASA an asteroid bigger than a city bus is on track to zoom by Earth Friday at a safe but close distance, less than one-fifth as far away as the Moon. The asteroid is estimated to be between 50 and 130 feet (15 and 40 meters) in size.
Astronomers from NASA says that asteroid 2014 RC will pass extremely close to Earth on September 7 . Asteroid 2014 RC discovered just days ago on August 31 by the Catalina Sky Survey near Tucson, Arizona, and independently detected the next night by the Pan-STARRS 1 telescope, located on the summit of Haleakalā on Maui, Hawaii. Astronomers estimate that the asteroid is about 60 feet (20 meters) in size. Its close pass, 2014 RC will be about 21,126 miles (34,000 km) from Earth’s surface. That’s about 10 times closer to the Earth than the moon.
Astronomers discovered the asteroids and the comets, which are approaching to Earth, the number of objects reached 10 thousand. The asteroid 2013 MZ5 with a diameter about 300 meters was found on June 18 by Pan-STARRS-1 telescope. By the words of Lindley Johnson (the director of NASA division of research of object approaching to the Earth) the detection of 10 thousand objects approaching with Earth is an important boundary. But it is necessary to find still in 10 times more before they can be sure that they won’t pass any, capable to face Earth and to do essential harm to her inhabitants. Objects approaching with Earth (NEO — Near-Earth objects) is the asteroids and comets which can approach to Earth closer, than on 45 million kilometers. Biggest of the asteroids is (1036) Ganymede asteroid, 41 kilometer in size in the diameter. Among 10 thousand found objects about 10% more than 1 kilometer.
The big asteroid, which flew by Earth last month, belongs to new category of space stones. On May 31 asteroid 1998 QE2 and its moon flew by in 3600000 miles (5800000 km) from Earth thanks to what it became the most approximate with our planet during in the next two centuries. The new radar images made by Arecibo radio telescope in Puerto Rico revealed that it is a unique binary asteroid. 1998 QE2 asteroid is dark, red, and primitive that is it doesn’t heat up or melts so as far as other asteroids. 1998 QE2 asteroid isn’t similar to one asteroid, which the scientists observed. This is absolutely new animal in a menagerie of the asteroids approaching with Earth. 305 meters Arecibo radio telescope and 70 m the antenna of a network of long-distance space communication of NASA traced 1998 QE2 asteroid as it came nearer to Earth last month.
The small comet P/2010 A2 (LINEAR) has characteristics at the same time an asteroid and a comet. For the first time this asteroid was open on January 6, 2010. When this asteroid was in the main asteroid belt, astronomers noticed at it a tail, as at a comet. For this reason initially this asteroid was entered in the catalog as a comet of the main asteroid belt.
About 1 month astronomers observed the object P/2010 A2 (LINEAR) with help of Hubble telescope. After one month the astronomers came to conclusion that it is not a comet with a tail from parts of ice, but an asteroid with a tail from a dust and the gas, formed after collision with any other space object.
If the dangerous asteroid departs towards to Earth, one of options will be sending the spaceship, which will destroy it a nuclear bomb.
Such mission which will cost about $1 billion can be developed in NASA, for protection against asteroids. Bong Wie, the director of the Research center at university of the State of Iowa, described system which develops it team, for visitors at the International conference on space development in La-Hoya, California, on May 23.
The anti-asteroid spaceship delivers the nuclear bomb to destroy threats before they will be able to reach Earth. The two-section spaceship will consist of an impact of kinetic energy, which will separate for crater creation in an asteroid. Other part of the spacecraft will bear the nuclear weapon, which will explode in an asteroid crater.
The purpose will consist in division of an asteroid into a set of parts, which then will disperse on separate trajectories.
Wie considers that 99 percent of parts of an asteroid will fly by Earth that considerably limits impact on a planet. What will overtake Earth, will burn down in the atmosphere and don’t pose any threat.
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.