Astronomers at the Australian national University has discovered the largest known planetary systems. Therein, except for the Central star has a large planet.
This planet makes a complete revolution around the sun in nearly a million years. This gas giant is at a distance of one billion kilometers from the star, which exceeds in 140 times the distance between Pluto and the Sun. Reported by the BBC.
Thus far, there are only a few of these planetary systems.
The exoplanet, which received the designation 2MASS J2126-8140 has a lot of 12-15 Jupiter. It was discovered in the programme of observations of young stars and brown dwarfs in the immediate galactic environment of the Sun. Astronomers came to realize that they see not two independent object at the same distance from the Sun is about 100 light years away, a planetary system.
“We were very surprised by the discovery of an object with such a relatively small mass so far from the Central star. Unlike Solar, this system could not occur from a huge gas-dust clouds,” says Dr. Simon Murphy from the Australian national University. Continue reading
One of the major negative biological factors of outer space, along with gravity, is radiation. But if the situation with the gravity on different bodies in the Solar system (e.g. on the moon or Mars) will be better than the ISS, with radiation, things are more complicated.
On the origin of cosmic radiation is of two types. It consists of galactic cosmic rays (GCR) and heavy positively charged protons emanating from the Sun. These two types of radiation interact with each other. In the period of solar activity, the intensity of galactic rays decreases, and Vice versa. Our planet is protected from solar wind by the magnetic field. In spite of this, some of the charged particles reaches the atmosphere. The result is a phenomenon known as the Aurora Borealis. High-energy GCR almost stopped by the magnetosphere, but they do not reach the Earth’s surface in dangerous quantities due to its dense atmosphere. The orbit of the ISS is above the dense layers of the atmosphere, but inside the radiation belts of the Earth. Because of this, the level of space radiation on the station is much higher than on Earth, but substantially lower than in the open space. Its protective properties of the Earth’s atmosphere pribliziteljny 80-cm layer of lead. Continue reading
Much does it cost to fly in space?
Previously the space was the subject of dreams and the destiny of only the elect, now to experience weightlessness or take a journey to the stars almost everyone can have money. To replace professional the orbit space tourism comes. Those wishing to become astronauts does not scare nor a long period of preflight preparation or high risk, so every year this extreme form of recreation is becoming increasingly popular .
Weightlessness for all
The “budget” option space tourism is a program of suborbital flights, in which the ship goes into orbit, the aircraft goes to higher altitude (about 100 km), which is a while, and then falls down, whereby passengers can enjoy all the delights of weightlessness.
Suborbital flights is the near future of space tourism, says academician of the Russian Academy of cosmonautics named after K. E. Tsiolkovsky Alexander Zheleznyakov. According to him, now several companies (Space Adventures, Another day universe and Virgin Galactic – ed.) are developing aircraft with such a dynamics that one can say that in 2014 will begin to be more or less regular flights. Continue reading