George Adcock's Latest Articles

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9.23.08

George Adcock (3,791 pts

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Contributing Editor in 1 Channel, Writer in 1 Channel

Contributions: 33

The 11th Dimension--Dualities, Branes and Multiple Universes
As physicists grappled with the five string theories, they began to see connections between them. There were dualities between the strong and weak forces in separate theories that made them equivalent. It seemed they were all special cases of one main theory--a theory of membranes, or branes.
Published by George Adcock (3,791 pts ) on Nov 20, 2009 to
Space Articles

Ares 1-X Flight Test Results and Program Status
The Ares 1-X test vehicle successfully completed its test flight. But the Review of U.S. Human Space Flight Plans Committee report questions the program, and leaves its future up in the air.
Published by George Adcock (3,791 pts ) on Nov 11, 2009 to
Space Articles

Astronomical Distance Measurements
The distances between the planets, and especially the stars and galaxies, are so vast the measurements we use here on Earth, kilometers and miles, are too cumbersome. Astronomers have developed other units to measure distances in the solar system and the universe.
Published by George Adcock (3,791 pts ) on Nov 8, 2009 to
Space Articles

The Eleventh Dimension--String Theory, Supersymmetry and Super Gravity
The development of string theory has caused an upheaval in subatomic physics. While problems with the theory remain, it seems to answer many questions left open by the Standard Model. Perhaps most importantly, it predicts the particle that carries gravity.
Published by George Adcock (3,791 pts ) on Oct 26, 2009 to
Space Articles

Orbital Mechanics and Interplanetary Trajectories
Navigating in space is not the same as moving about on Earth. You are dealing with the interaction of two bodies--the Earth and the spacecraft. That brings into play laws developed by Kepler and Newton that dictate how a spacecraft can move in orbit.
Published by George Adcock (3,791 pts ) on Oct 5, 2009 to
Space Articles

Rocket Science - The Very Basics
There are two basic factors that determine a rocket's performance--its mass ratio and the exhaust velocity of its propellants. These are critically entertwined. Beyond that, rocket scientists must consider the trajectory they will send the vehicle on into space.
Published by George Adcock (3,791 pts ) on Sep 14, 2009 to
Space Articles

How Galaxies Form and Grow
About 300,000 years after the Big Bang, the universe consisted primarily of hydrogen atoms, Cold Dark Matter (CDM) and baryons. Shock waves from the Big Bang still reverberated through this mix, and caused it to form clumps. The clumps would eventually form galaxies.
Published by George Adcock (3,791 pts ) on Sep 12, 2009 to
Space Articles

The Mecury Missions
American manned spaceflight began with two quick testing of the waters dips on suborbital flights aboard the Mercury Redstone. Then, atop the more powerful Mercury Atlas, four Astronauts spent ever increasing time orbiting the Earth.
Published by George Adcock (3,791 pts ) on Sep 3, 2009 to
Space Articles

NASA's First Project: The Mercury Redstone Program
There was no guide to follow for space travel. NASA engineers were in uncharted territory. They selected an existing IRBM and ICBM as launch vehicles, and based the spacecraft on ICBM reentry vehicle designs. For pilots, they selected military test pilots.
Published by George Adcock (3,791 pts ) on Sep 3, 2009 to
Space Articles

Gemini Space Program--Finally, Success
It took one more stumble, but Gemini finally achieved its goals of docking with the Agena and using the stage to maneuver. Along the way three more astronauts took strolls around the Earth.
Published by George Adcock (3,791 pts ) on Sep 1, 2009 to
Space Articles

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