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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 Congress has now made it clear that they want the immediate development of a heavy lift vehicle and a crew explorato... -
by Marcel F. Williams During the Great Depression, the Roosevelt administration decided to create jobs in the US by expanding electric power... -
SLS launched ETLV-2 at EML1 liquid hydrogen and oxygen fuel depot (ETLV derived) while the MPCV waits to dock with the now fully fueled... -
by Marcel F. Williams Fossil fuels are predominantly responsible for putting excess carbon dioxide and methane into the Earth's atmosp... -
Mars and its inner moon, Phobos by Marcel F. Williams T he average woman on Earth is born with an approximately 38% chance of devel... -
by Marcel F. Williams In 1982, the United States Congress passed a law requiring the Department of Energy to find a suitable site to con...
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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 America has the best hospitals, physicians, nurses, and medical technicians in the world! Unfortunately, the US also... -
by Marcel F. Williams On December 17th 1935, the Douglas Aircraft Company introduced an new airplane that revolutionized commercial air trav...
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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