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CINEMA FANTASTIC
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by Marcel F. Williams Tuscany is renowned for its beautiful cities of Florence and Siena, and is historically famous as the birthplace ... -
by Marcel F. Williams On December 17th 1935, the Douglas Aircraft Company introduced an new airplane that revolutionized commercial air trav... -
by Marcel F. Williams During Space Shuttle manager John Shannon's presentation of the Side-mount Shuttle (SD-HLV) concept to the Augu... -
by Marcel F. Williams The Review of U.S. Human Space Flight Plans Committee (the Augustine Commission) recently concluded that NASA's C... -
by Marcel F. Williams Congress has now made it clear that they want the immediate development of a heavy lift vehicle and a crew explorato... -
The Constellation program was supposed to return America to the Moon-- to stay. But in the words of President Barak Obama on April 15 "... -
International Association of Machinists and Aerospace Workers "......NASA plays a critical role in both our national and economic s... -
X-Ray of a notional regolith shielded 16 meter in diameter biosphere (Credit: NASA) by Marcel F. Williams A t least 0.1 g is required... -
by Marcel F. Williams Fossil fuels are predominantly responsible for putting excess carbon dioxide and methane into the Earth's atmosp... -
by Marcel F. Williams U kraine will never be truly safe from Russian aggression unless its under the nuclear umbrella of a friendly nation ...
1 comment:
The delta v station keeping requirements for Earth-Moon L1 and L2 are less than 10 meters/second. But the delta v station keeping requirements for L3, L4, and L5 are less than 1 meter/ second.
However a lunar equatorial Distant Retrograde Orbit (DRO) would have station keeping delta v requirements of only a few centimeters/second per year. So DRO is the best place far large rotating space stations and space colonies within cis-lunar space.
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