A spaceship will swing by Earth on Friday and use our planet's gravity to help it pick up speed on its way to explore an asteroid.
원문출처 : http://www.cnn.com/2017/09/22/us/nasa-osiris-rex-slingshot-past-earth/index.html
원문출처 : http://www.cnn.com/2017/09/22/us/nasa-osiris-rex-slingshot-past-earth/index.html