Shared publicly  - 
 
Watch the live video documenting the end of the Grail moon mission, and check out the tweets by searching for the hashtag #GRAIL:
1
1
David Burch's profile photoAlan Boyle's profile photoDavid Andrews's profile photoCosmic Log's profile photo
4 comments
 
Are we able to go anywhere without leaving a stream of garbage behind us?
 
I'm imagining orbital garbage collectors in the 22nd century, wondering how we could have been so wasteful. Actually, that's how +David Brin's book "Existence" begins...
 
yes. Consider the refined precious metals and highly engineered materials committed to reentry.
What a resource.
Add a comment...