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>From OTA@S1-A Sat Feb  6 03:07:05 1982

SPACE Digest                                      Volume 2 : Issue 99

Today's Topics:
		      half-time power from the moon
			       NASA budget
			    "horseshoe" orbits
			    LA l-5 convention
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Date: Friday, 5 February 1982  08:44-PST
From: KING at KESTREL
Subject: half-time power from the moon
To: space at mit-mc
cc: King at KESTREL

	Don't lunar power stations cease to function two weeks every
month? 

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Date:  5 Feb 1982 1036-PST
From: Paul Dietz <DIETZ at USC-ECL>
Subject: NASA budget
To: space at MIT-MC


    Heaviest cuts were in technology for transport aircraft and advanced
    propulsion.

Does this include scramjets?  In my opinion developing the technology for
single stage to orbit (SSTO) vehicles is a lot more important than
planetary exploration.

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Date:  5 Feb 1982 1310-CST
From: Jonathan Slocum <LRC.SLOCUM at UTEXAS-20>
Subject: "horseshoe" orbits
To: space at MIT-MC
cc: knutsen at SRI-UNIX

I'm sure there will be plenty of other replies on this, but...

The word "horseshoe" may be unfortunate.  But imagine TWO of them,
ends-to-ends, one slightly larger than the other.  That's what is
meant.  The satellites do not reverse their course; they merely
exchange orbits.  As the lower one catches up with the higher one,
their mutual gravitational attraction acts to accelerate the former
and retard the latter; the lower one thus moves into a higher orbit,
and the higher one, into a lower orbit.  They continue on their
merry ways until the next encounter/dance.

Actually, it surely takes several revolutions til the next meeting,
so the horseshoe analogy does not exactly fit.  But it's poetic,
isn't it?

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Date: 6 February 1982 04:05-EST
From: Jerry E. Pournelle <POURNE at MIT-MC>
Subject: LA l-5 convention
To: Wedekind.ES at PARC-MAXC
cc: POURNE at MIT-MC, WEDEKIND.ES at MIT-MC, REM at MIT-MC,
    RMS at MIT-MC, PDL at MIT-MC, SPACE at MIT-MC, SF-LOVERS at MIT-MC

The L-5 Convention is at the Hyatt International (LA AIRPORT
HYATT) over the weekend of 2-4 April.  Usual convention costs
(around $30 at the door; "professional membership" including
banquet, some papers, and a reception is about $75).
	Guests of Honor: Robert A. Heinlein
			Fred Haise (Grumman VP, Commander of
Apollo 13)

	Keynote Speaker: Dr. Hans Mark, Deputy Adminnistratior
NASA, former Secretary of the Air Force.  Featured Guest:
Honorable Newt Gingrich, Representative from Georgia, CoChair of
the Congressonal Space Caucus.  Arthur Kantrowitz, Gary Hudson
(private rocket constructor) Harry Stine, George Merrick and
Chuck Gould of Rockwell, General Dan Graham, and a buncha other
notables.
	Convention cochaired by Je Pournelle and Milton Stevens
(Stevens, a former Worldcon SF type, does most of the work).
	Purpose is to get enthusiasts and professionals
together, adn to generate a strategy for the advancement of the
space program.
	Please feel free to pass this messag on to whomever you like.

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End of SPACE Digest
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