NASA to launch twin satellites for nine-month moon study mission – an annotated graphic

They’re as busy as ever over at NASA. As if the SLS wasn’t enough, it has also been announced that the US space agency plans to launch two spacecraft on a nine-month mission to map the moon’s gravity field. The aim of all this is to improve our knowledge of the moon’s interior and its evolution.  Naturally, such an expedition deserves a snappy acronym, so the two spacecraft are collectively known as the Gravity Recovery And Interior Laboratory – or GRAIL – satellites. God speed, heavenly bodies.

Click on the graphic for an expanded view.

NASA's GRAIL moon mission
NASA's GRAIL moon mission
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