To: MtnClimber
How do they determine that the ejecta is gravel, as opposed to ice chunks?
12 posted on
09/17/2020 11:37:11 AM PDT by
JimRed
(TERM LIMITS, NOW! Build the Wall Faster! TRUTH is the new HATE SPEECH.)
To: JimRed
Probably the color, but possibly spectrum analysis. The OSIRIS-REx spacecraft will touch down next month and attempt to return to earth with a sample.
13 posted on
09/17/2020 12:01:40 PM PDT by
MtnClimber
(For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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