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admin | Category: Cheap Workout Equipment For Home | 27.10.2015
The planets furthest out are also the coldest because they receive the least heat energy from the Sun. For example, Mercury, the closest planet to the Sun, takes just 88 Earth days to complete an orbit. The graph shows the distances of the planets from the Sun and the time it takes them to orbit once around it. As the space rock burned up over the city of Chelyabinsk, the shockwave blew out windows and rocked buildings causing millions of dollars in damages.
Numerous videos of the fireball were taken with camera phones, CCTV and car-dashboard cameras and subsequently shared widely on the web. Early estimates of the meteor's mass put it at ten tons; US space agency Nasa later estimated it to be between 7,000 and 10,000 tons.
Using the footage and the location of an impact into Lake Chebarkul, Jorge Zuluaga and Ignacio Ferrin, from the University of Antioquia in Medellin were able to use simple trigonometry to calculate the height, speed and position of the rock as it fell to Earth. To reconstruct the meteor's original orbit around the Sun, they used six different properties of its trajectory through Earth's atmosphere. The researchers then plugged their figures into astronomy software developed by the US Naval Observatory.
Of about 9,700 near-Earth asteroids discovered so far, about 5,200 are thought to be Apollos. Dr Stephen Lowry, from the University of Kent, said the team had done well to publish so quickly.

Chelyabinsk, Ignacio Ferrin, Jorge Zuluaga, Lake Chebarkul, meteor, University of Antioquia.
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Researchers have been gearing up for the cloud's approach to the galaxy's enormous central black hole, with its closest approach in September. David Cameron says he is "puzzled and disappointed" after Iain Duncan Smith resigns as work and pensions secretary and attacks disability benefit cuts. Now the week comes to a close with a celestial trifecta involving a rare overlap of a supermoon, a total solar eclipse and the start of spring. According the EarthSky, the next time this convergence will happen is in 19 years on March 20, 2034. During this time, the moon is at the closest to the Earth than at any other time making it appear 14 percent bigger and 30 percent brighter than other full moons. Gravity only becomes noticeable when there is a really massive object like a star, planet or moon. Diagrams often show the orbits as very squashed, but this is just to get a sense of perspective and to fit the diagrams onto the page. The shape of the curve shows that the further out a planet is the longer it takes to orbit the Sun.
Most of these are related to the point at which the meteor becomes bright enough to cast a noticeable shadow in the videos.

The results suggest the meteor belongs to a well known family of space rocks - known as the Apollo asteroids - that cross Earth's orbit. Asteroids are divided into different groups such as Apollo, Aten, or Amor, based on the type of orbit they have. The rare solar eclipse will sweep across parts of Africa, Europe and the United States as the moon blocks the sun either fully or partially, depending on the location. However, rude or foul language, discriminative comments (based on ethnicity, religion, gender, nationality, sexual orientation or the sort), spamming or any other offensive or inappropriate behaviour will not be tolerated. But as Dr Bartos points out, it is the first real chance to get a look at what may be thousands of smaller black holes hidden between us and the galactic core."It's a very special opportunity, and it's also lucky that we've now got the capacity to observe these things with X-ray telescopes on satellites," he said. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience.
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