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Massive asteroids JF1, Apophis to graze Earth in 2020s; planetary defence courtesy NASA, ESA still underway- Technology News, Firstpost
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NASA asteroid horror: Radars track potential impact date in May 2022 with 230 kiloton rock | Science | News | Express.co.uk
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NASA asteroid horror: Radars track potential impact date in May 2022 with 230 kiloton rock | Science | News | Express.co.uk
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NASA asteroid horror: Radars track potential impact date in May 2022 with 230 kiloton rock | Science | News | Express.co.uk
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