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1The moon takes  days to complete one revolution around the Earth.
 
2If the Moon is appeaing in the sky today near the star Karthikai , the position of the Mon after 27 days is near the star 
 
3. Telescope was invented by .
 
4. The galaxy containing young and hot stars is .
 
5. With the launch of this satellite, ISRO became capable of launching 4 ton heavy satellites