Could we ma­nip­u­late grav­ity?

BBC Earth (Asia) - - Science -

Grav­ity is easy to ma­nip­u­late: it’s just a mat­ter of mov­ing masses around. The chal­lenge lies in achiev­ing any­thing use­ful by do­ing it, as grav­ity is in­cred­i­bly fee­ble. Even so, NASA has suc­ceeded many times, by wait­ing un­til plan­ets are in spe­cific lo­ca­tions be­fore launch­ing probes, and us­ing the grav­ity of the plan­ets to hurl the probes to pre­cise lo­ca­tions. RM

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