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Space
16 December 2020
International Gemini Observatory
For a brief period this year, Earth had an extra moon. The object, called 2020 CD3, was spotted hurtling across the sky in February. After calculating its orbit, astronomers found it had probably been gravitationally bound to Earth for about three years before anyone noticed. By studying its brightness, they calculated that it was probably between 1.9 and 3.5 metres across – about the size of a car.
At the time, it wasn’t 100 per cent clear whether this was a natural object or just a piece of artificial space debris. Now we are fairly sure that it was natural, says Grigori Fedorets at Queen’s University Belfast in the UK. His team has also confirmed its diameter is about 1.2 metres, or around the height of a 6-year-old. ....

Grigori Fedorets , Scientist Default Image International Gemini Observatory , Scientist Default Image , International Gemini , விஞ்ஞானி இயல்புநிலை படம் சர்வதேச ஜெமிநை கண்காணிப்பு , விஞ்ஞானி இயல்புநிலை படம் , சர்வதேச ஜெமிநை ,