From: Jan Wee <jwee@mail.arc.nasa.gov>
Subject: Challenge Question #5 Results
Date: Wed, 30 Apr 1997 10:16:59 -0500
Dear discuss-lfm members,
The results are in for Challenge Question #5!
THE QUESION:
Last week, in CQ #5: BRUSH UP ON YOUR GREEK, we asked:
There's a letter in the Greek alphabet that's very important both to
launching NASA's current Mars missions and to getting to Mars.
What's that letter and explain how it is used.
ANSWER:
Both Mars Pathfinder and Mars Global Surveyor were launched aboard
Delta II rockets from Cape Canaveral, as seen during LFM program
101. "Delta V" is what rocket scientists (including the Navigation
teams who were featured during program 102) call the "change in
velocity" that keeps a spacecraft on course for a distant planet.
Trajectory correction maneuvers fine tune the route by a
combination of precise timing, and carefully controlled "burns"
providing additional velocity in specific direction.
RESULTS: FIVE Challenge Question #5 entries were correct,
but Thabet Fishawi gave the BEST answer!
>>>> Congratulations, Thabet! <<<<
HONORABLE MENTION: Stephanie Wong, Linda Lund's
Redeeming Love Christian Academy, Robert Gillmor,
Dixon Middle School Mesa Class.
Great job to all of you!
Thanks to all for entering their answers!
Jan Wee, moderator
PS: Challenge Question #6 Answers are DUE TODAY, April 30th!