Small Asteroid to shave Safely by Earth

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.

Astronomical objects conjunction calendar for 2013

A conjunction occurs when two astronomical objects have either the same right ascension or the same ecliptical longitude, normally when observed from the Earth. In the case of two objects that always appear close to the ecliptic – such as two planets, or the Moon and a planet, or the Sun and a planet – this implies an apparent close approach between the objects as seen on the sky. In contrast, the term appulse is defined as the minimum apparent separation on the sky of two astronomical bodies.
Conjunctions therefore involve two Solar System bodies, or one Solar System body and one more distant object such as a star. A conjunction is an apparent phenomenon caused by perspective only: there is no close physical approach in space between the two objects involved. Conjunctions between two bright objects close to the ecliptic, such as two bright planets, can be easily seen with the naked eye and can attract some public interest.

Astronomers counted 65 gamma radiation sources of the unknown nature

Astrophysics carried out census of the objects giving gamma radiation with energy over 10 gigaelectronvolts. Among 514 sources independently stand 65: their nature still isn’t established. Data which allowed to make the new catalog, gathered on an extent of three years with help of the most perfect for today a gamma telescope. The gamma telescope of Fermi represents the specialized detector with help of which it is possible to register quanta with energy to hundred gigaelectronvolts. The authors of the new review emphasize that this energy is much more of that which the previous gamma observatories allowed to register. Many of the objects which have entered into it (the share of the such made 87 percent) were known and earlier, but then scientists didn’t know how these gamma radiation sources will look at supervision in the range over ten gigaelectronvolts. Most of all bright points in the sky left active kernels of galaxies in which supermassive black holes absorb plasma surrounding them.

Astronomers made out protoplanetary of a dust trap

The astronomers working with data of new observatory of ALMA, for the first time made out a dust trap in which comets and germs of future planets are formed round a young star. Supervision over the Oph-IRS 48 system located at distance of 400 light years from Earth, were carried out in the millimetric range with help of only a half of telescopes of observatory of ALMA. Nevertheless, permission of the image allowed to make out distribution of particles of a dust of the different size round a star. Scientists found out that rather large particles about a millimeter in size are distributed in a protoplanetary disk extremely unevenly. Instead of ring-shaped structure, which the astronomers expected to see, they found a form, in accuracy similar to a cashew nut. According to the scientists, the found area represents a dust trap, where particles of a space dust are capable to stick together with each other, growing to the sizes about a kilometer. In other areas of a protoplanetary disk growth of clots is limited by their continuous mutual collision. Authors explain that in a dust trap of Oph-IRS 48 system most probably formation of comets, instead of full-fledged planets.

Astronomers found hydrogen gas clouds – the bridge between the galaxies

In intergalactic space astronomers found huge threadlike clouds of gas from the ionized hydrogen, which can be the indicator of thin threads from the dark matter connecting cells of global space. The previous cycles of supervision over empty space between galaxies indicated of possibility existence of clouds of hydrogen between them. But the astronomers couldn’t determine the sizes of these hydrogen gas clouds and their property. With help of a radio telescope Green-Bank the astronomers were succeeded to understand that it not shapeless clouds, but quite accurate structures. For several weeks the astronomers watched the closest neighbors of our Milky Way, Andromeda’s galaxies and the Triangle. These “star megalopolises” drew attention of astronomers still a year ago, when they found in data of radio observations hints on existence of big congestions of hydrogen in intergalactic space. According to astrophysicists, all these clouds are located along the line connecting Andromeda and the Triangle.

The astronomers found starburst galaxies In the Dragon constellation

The American astronomers found rather small galaxy of HFLS3, stars in which were formed in two thousand times quicker, than in our Milky Way that allows ranking it as a new class of super-starburst galaxy in the early Universe. According to the astronomers, this galaxy is the certificate of that, that in the very ancient time, through only 800 million years after the Big Bang, there were possible rough episodes of a star formation. The scientists managed to track one of the most important eras in the history of development of the first galaxies of the Universe. The astronomers found HFLS3 starburst galaxy with super speed star formation, studying the data collected by a land radio telescope of VLA and orbital observatory Hershel during supervision over constellation of the Dragon. In these pictures scientists noticed rather bright point, which range was strongly stretched because of huge distance, which light passed from its source to observers on Earth.

Astronomers Discovered Absolutely New Type of Mini Supernova

The opening was done by the astronomers from the Harvard-Smithsonian Center of Astrophysics by led of astronomer Rayan Foley. Earlier this type was unknown. The supernova received Iax designation. Unlike all other types the supernova explosion was so weak that astronomers hardly noticed it. The found supernova of this type called “mini supernova”. According to astronomers the material from the blue hot star consisting mainly of such chemical elements as helium, falls into the dwarfish star consisting of oxygen and carbon.

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