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Shijian-18 was a Chinese communications and technology demonstration satellite developed and launched by the China Academy of Space Technology on 2 July 2017. It was the maiden flight of the DHF-5 satellite bus, which is designed with 16-year lifespan. Shijian-18 carried 18 experiments on board involving communications and space telescopes.
[2] [4] [5] [6] Later, Shiyan 7 shifted to rendezvous with Shijian 7 (of unknown mission) with whom it maintained proximity from 19 to 20 August 2013 until it maneuvered into a 5 km lower orbit. [ 4 ] [ 7 ] Drawing further suspicion, around 19 October 2013, Shiyan 7 maneuvered to a 1 km higher orbit and released a previously untracked object ...
Research indicates that the patch is rapidly accumulating. [14] The patch is believed to have increased "10-fold each decade" since 1945. [16] The gyre contains approximately six pounds of plastic for every pound of plankton. [17] A similar patch of floating plastic debris is found in the Atlantic Ocean, called the North Atlantic garbage patch.
Debris can be very harmful to marine life in the patch. For example, loggerhead sea turtles often mistake plastic bags for jellies, a major food source, according to National Geographic .
A garbage patch is a gyre of marine debris particles caused by the effects of ocean currents and increasing plastic pollution by human populations. These human-caused collections of plastic and other debris are responsible for ecosystem and environmental problems that affect marine life, contaminate oceans with toxic chemicals, and contribute ...
The goal was specifically to quantify the amount of large debris, including ghost nets in the patch. [80] Slat stated that the crew saw more debris than expected. [81] The project released an app called The Ocean Cleanup Survey App, which enables others to survey the ocean for plastic, and report their observations. [82]
The South Pacific garbage patch is an area of ocean with increased levels of marine debris and plastic particle pollution, within the ocean's pelagic zone. This area is in the South Pacific Gyre , which itself spans from waters east of Australia to the South American continent, as far north as the Equator , and south until reaching the ...
Research indicates that the patch is rapidly accumulating. [13] The patch is believed to have increased "10-fold each decade" since 1945. [15] The gyre contains approximately six pounds of plastic for every pound of plankton. [16] A similar patch of floating plastic debris is found in the Atlantic Ocean, called the North Atlantic garbage patch.