Solar system is a system of planets orbiting around a star, the Sun. Among those planets is our Earth. The solar System consists of the sun and of celestial bodies held by solar gravity. The mass of the sun is about 330 000 times the mass of the earth and makes up 99.8% mass entire solar system. The diameter of the sun is 1 400 000 km, i.e. about 109 Earth diameters. In the solar system except the sun is made up of eight planets, over 150 moons, and small bodies such as asteroids, comets and meteors.
In order of proximity to the Sun, the eight planets are mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
To measure distances in the solar system is used “astronomical unit” (AU). One AU corresponds to the distance from the earth to the Sun. Thus, the distance of one AU is nearly 150 million kilometers. For example, Jupiter rotates on its orbit 5.2 AU, i.e. the distance from the Sun is 5.2 times larger than the Earth. Continue reading
The Antares rocket with the space vehicle-truck Cygnus was launched from wallops flight facility in Virginia on the US East coast. This is the second flight of Cygnus to the International space station and the first of eight scheduled flights that are under contract with the National Agency of Aeronautics and space will carry out a private firm Orbital Sciences.
The docking of Cygnus with the International space station is scheduled for Sunday, January 12th. The ship will deliver to the station’s scientific equipment, as well as clothing and food for the ISS crew.
Initially, the launch of Cygnus was scheduled for December 19, but the launch was postponed for technical reasons.
The launch was performed the next day after NASA announced the decision to extend its participation in the ISS project until 2024, that is four years longer than previously planned.
Today, however, flights of private vehicles is not a novelty. The first launch of “private owners” was completed on may 22, 2012, then the Dragon spacecraft headed successfully to the international space station. American South African-born entrepreneur Elon Musk, sold in 2002, he created PayPal, decade put to private ships plied the space. It took him less than $1 billion of private investment to a hitch, which NASA refused for lack of funds. Continue reading
25 000 light years from Earth discovered a huge planet eight times bigger than Jupiter
An international team of astronomers has discovered a world that is 2,500 times the size of Earth.
A planet called MOA-2011-BLG-322 about 8 times that of Jupiter, which is the largest planet in our solar system. Astronomers believe it orbits around a star, distant from us at a distance of 25 000 light-years and with a mass equal to a third of the Sun.
Huge world, exceeding the size of the Earth 2,500 times, was discovered by an international team of astronomers. Artistic representation of an unknown planet
As reported by Ian O’neill in Discovery News, the giant planet was discovered using a technology known as “microlensing”.
Microlensing uses the General theory of relativity of albert Einstein, which assumes that gravity is actually the curvature of space and time. Continue reading