* Astronomy

Some 500 aircraft companies from around the world have flocked to an air show in southern India hoping to cash in on the country's booming aviation sector.
The five-day event at the Yelahanka air base in Bangalore will showcase a range of new civilian and military aircraft.
India plans to buy 126 fighter jets for its air force to replace its fleet of ageing Soviet-era MiG-21s.
Industry estimates suggest India will need more than 1,000 planes over the next two decades as air travel booms.

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