Instructions: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: A new interactive animation shows we are not alone, because Earth is surrounded by junk. 
  
 “Space junk” or orbital debris is any manmade item orbiting Earth and no longer in use, according to NASA. The U.S. Space Surveillance Network tracks anything larger than 10 centimeters. There are currently more than 500,000 pieces of debris being tracked, 20,000 pieces range from the size of a softball up to the size of a bus and moving at speeds up to 17,500 mph. 
  
 The visualization starts at the beginning of the Space Race in 1957 with the launch of Sputnik 1. Each mission thereafter created more space debris. Less than 5 years later when the first manned spacecraft launched in 1961 there were already 200 objects in orbit. 
  
 Dr Stuart Grey, UCL A graphic shows the current amount of space debris orbiting Earth. A graphic shows the current amount of space debris orbiting Earth. (Dr Stuart Grey, UCL) (Dr Stuart Grey, UCL) 
  
 In 2007, a Chinese missile test created more than 2000 pieces of debris and in 2009 two satellites collided and created another 2000 items of debris. Today more than 20,000 pieces of debris orbit the Earth. 
  
 Dr. Stuart Grey at University College London, Space Geodesy and Navigation Laboratory created the interactive graphic using data from space-track.org. According to their website space-track.org promotes spaceflight safety and the peaceful use of space. 
  
 The space debris visualization is featured in the London-based Royal Institution’s 2015 advent calendar. Each day displays a new space-themed item ranging from a video about astronaut dreams to experiments in zero gravity. 
  
 Even the smallest piece of debris can be disastrous for satellites and spacecrafts. NASA protocol is that action must be taken when debris comes within a 30 miles by 30 miles field of the spacecraft. When a debris field is determined in advance the space station can be maneuvered to avoid the collision, but if quick action is needed the crew will move to the Soyuz spacecraft. 
  
 The Department of Defence's Joint Space Operations Center is responsible for tracking NASA's spacecrafts and notifying NASA when a close approach with space debris is likely. 
  
 In July, the space station crew were forced to stay inside the Soyuz capsule for about an hour as an old Russian weather satellite quickly approached and missed the station. 
  
 If space debris orbits low enough to re-enters the Earth's atmosphere they rarely cause any harm. Californians were recently treated to a light show when a Russian SL-4 rocket body re-entered the Earth's atmosphere and burned up. 
  
 More than 100 items of known space debris have fallen from orbit this year, Capt. Nicholas Mercurio, a spokesman for the Joint Functional Component Command for Space told the Los Angeles Times. 
  
 Watch the video above to see the quick version of the graphic, visit rigb.org/docs/debris/ to see the full demonstration. 
  
 Want more space? Follow me @emspeck and like the Go For Launch Facebook page. ||||| Published on Dec 20, 2015 
  
 Almost 20,000 pieces of space debris are currently orbiting the Earth. This visualisation, created by Dr Stuart Grey, lecturer at University College London and part of the Space Geodesy and Navigation Laboratory, shows how the amount of space debris increased from 1957 to 2015, using data on the precise location of each piece of junk ( from https://www.space-track.org ). 
  
  
  
 To see the full story, visit the Royal Institution advent calendar at: http://rigb.org/christmas-lectures/ho... 
  
  
  
 Find out more at http://www.stugrey.com or http://www.twitter.com/stugrey ||||| Stuart Grey, UCL 
  
 When you look into the night sky to marvel at the stars and ponder the vast, unknown chasm that is our universe, you may not spare a thought for what else is up there. Not UFOs, of course -- space debris. 
  
 Yes -- there are currently around 20,000 fragments of space junk orbiting the Earth. Pieces of old satellites, used rocket stages and fragments from collision, erosion and disintegration -- they're all floating up there. 
  
 Closer to Earth, below 2000km, there are around 300,000 pieces, made up of rocket motors, paint flakes, frozen coolant and more. 
  
 Now, Stuart Grey, a lecturer at University College London, has created a video to show how this junk has accumulated. Starting in 1957, when Sputnik first flew, the video shows how collisions and increased space traffic have caused a rapid increase in space debris. 
  
 These loose items don't just look messy, however. Travelling around the Earth at around 17,000mph, they pose serious risk to astronauts and satellites also in orbit. Most unmanned orbits are protected by shields, preventing major damage, but low-mass impacts can cause serious damage by crafts powered by solar panels. 
  
 You may not be safe down on land, either -- according to Nasa, around one piece of debris has fallen to Earth everyday for the last fifty years. ||||| If you somehow had a way to rocket into space prior to October 4, 1957, and look back on the Earth, you would have seen that it was a planet with nothing but the vastness of space surrounding it (well, and whatever magic capsule you were in). Fast forward to today, and that look back at our planet is very different. Since the Russian satellite Sputnik launched on that October day 58 years ago, we've sent thousands of other objects into orbit around our planet, resulting in an ever-growing storm of space junk surrounding Earth. 
  
 A recent YouTube video from Stuart Grey, a lecturer at University College London, shows, in one striking minute, just how dramatically we've littered the space around Earth over the last six decades. Grey used data from Space-Track.org, a group that monitors space debris, to build his model. 
  
 According to NASA's Orbital Debris Program, there are currently over 21,000 pieces of space junk that are larger than 10 cm (about 3.9 inches) circling our planet. In the 1-10 cm (about .4-4 inches) in diameter range, there are about 500,000 pieces, while debris measuring less than 1 cm exceeds 100 million. And if you think those tiny particles are nothing to worry about, think again. The particles can travel at speeds up to 17,500 miles per hour (about 28,163 kilometers per hour), making them quite hazardous. 
  
 "Even tiny paint flecks can damage a spacecraft when traveling at these velocities," says NASA. "In fact a number of space shuttle windows have been replaced because of damage caused by material that was analyzed and shown to be paint flecks." 
  
 Space junk is getting to be so prevalent that crew members aboard the International Space Station had to seek emergency shelter in the space outpost's Soyuz capsule in July as a chunk of space debris thought to be the remains of an old Russian satellite came speeding at them at about 35,000 miles per hour (about 56,327 kilometers per hour). 
  
 Several means of cleaning up space debris have been suggested -- including a Pac-Man-like satellite, nets and lasers -- although none have been put into place as of yet. ||||| × Forgot Username 
  
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Output:
More than 500,000 known objects are orbiting planet Earth, and around 20,000 of them are at least as big as a softball, reports NASA. Now a University College London professor has used data from space-track.org to create a video to help us visualize how quickly that space junk has accumulated thanks to space traffic and collisions, reports Wired UK. NASA notes that there have been few disastrous collisions, but it points to two recent ones—a Chinese missile test in 2007 and the collision of two satellites in 2009—that threw 5,000 items of debris into orbit. In his video, lecturer Stuart Grey first takes us back to 1957, with the launch of Sputnik 1 and the space race, reports the Orlando Sentinel. The few minor objects multiply rapidly, and he has to pan out to view the entire array. NASA says it works with the Department of Defense to maintain a "highly accurate satellite catalog on objects in Earth orbit that are larger than a softball," and Houston and Moscow mission controls work together to help avoid debris "encounters." So far, no practical way of cleaning up the junk has emerged, notes CNET. Meanwhile, about one piece of debris has fallen to Earth every day for the past 50 years. (Here are five weird examples of space junk returning to our planet's surface.)