update on osiris-rex

open/osirisRex.md

@@ -5,45 +5,48 @@ Overview
   - Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer
 * Why? What is the scientific goal?
 * Why this particular asteroid?
-   - Feasible to reach or scientifically especially interesting.
+  - Easy to reach 
+  - or scientifically especially interesting.
 * What sensors does the spacecraft have for the science?
-* What will OSIRIS-REx do that's never been done before?
+* What's new? What will OSIRIS-REx do that's never been done before?
 * When did it launch? How long do we expect the trip to be?
-
 * The spacecraft itself
   - sizes, weights
   - bus systems (not scientific) 
+  - Electronics, Processors, Software, Languages.
 
 
 How to get there - and back
 -------------------------------------------------------
+
+* Trajectory overview.
 * Slingshot. Explain.
 * What is the required precision wrt. to timing, locations, etc.
   to make such a slingshot work?
 * Can a slingshot change the orbital plane/inclination?  
-  (Bennu is six degrees off ...) I thought one can only 
-  boost "in plane"?
+  - Bennu is six degrees off ... 
+  - I thought one can only boost "in plane"?
 * How have previous missions helped NASA perfect the art of the gravity assist?
-* How do you monitor, control, the orbit
 * Which kinds of trajectory-altering burns are necessary
+* How do you monitor, control, the trajectory?
 * Longer "sleep" phases?
 * What kind of propulsion? Chemical vs. Electric?
 
 
-
 Redezvous/Landing
 ------------------------------------------------------
 * More like a "docking" as in Rosetta? Or real "landing"?
   - What is the gravitational situation like?
   - How does it "anchor" itself to the asteroid?
 
-* How do you technically grab the sample? Drill?
+* How do you technically grab the sample? 
+  - Drill?
 
 Sample Return
 ------------------------------------------
 * Why not do the science there?
   - is it easier to get material back vs.
-  - bringing the lab there 
+  - bringing the lab there for in-situ analysis?
 * What kind of science do we hope to gain from studying Bennu, 
   especially with samples here on Earth?
 * How do you determine when and where to get the sample from Bennu?