By: Katriena Knights
Wilhelm Conrad Roentgen (or Röntgen) was a well-known and accomplished physicist, but he is best known for his discovery of X-rays. This discovery changed medical science, giving doctors a way to look at interior structures of the body without resorting to surgery. As with...
A look at NASA's Orion deep space exploration vehicle
By: Steven Mars
Orion is a multi-purpose crew vehicle (MPCV) that will take astronauts to the moon and asteroids. Its first test launch will be next year (2013). It is expected to be a safe answer to multiple missions using efficient technology built by NASA. It will also...
The chemical composition of sapphires
By: J. Lang Wood
Sapphires are known for their deep, blue color and romantic history. The gemstone is associated with royalty, and in fact many of these stones can be found in the crowns of European royalty, as well as in the gem collections of ancient Asian potentates. Sapphires...
By: Elizabeth M Young
NEOShield has not been given a lot of publicity beyond the circles of humans who have been involved with the project. The word NEO stands for Near Earth Object. The word Shield implies that some form of identification, shielding, diversion or destruction programs will be...
By: Elizabeth M Young
There is a new view of a very old Nebula, thanks to the Hubble Telescope. A nebula is formed when a star that is like our own sun dies and glowing gas forms around the orb. The sun at the center of The Helix Nebula...
By: Nick Ford
Following the success of the Pioneer and Voyageur projects which flew past Jupiter in the 1970s, NASA started work on the Galileo project. Their plan was to develop a probe which would traverse close to the giant planet and conduct a thorough study of the...
By: John Traveler
Today, the Global Positioning System (GPS) has pretty much negated the use of more antiquated methods of navigation, but there was a time when navigators used observational readings of the Sun by day, and Moon and stars by night to determine position and heading. The...
By: Michael Totten
Emeralds are a type of hexagonal beryl crystal. Pure beryl, or beryllium aluminum cyclosilicate, is always colorless. Most beryls found in nature are not pure. The type of impurity determines the color of the beryl crystal. In emeralds, the impurity is caused by chromium. Unlike...
By: Michael Totten
Sometime between the next 3 to 5 billion years, the Andromeda galaxy and the Milky Way galaxy will probably collide with each other. This collision between the 2 largest galaxies in the Local Group will bring more than 2 hundred billion stars into close proximity...
By: Michael Totten
Martian meteorites are rocks which originated on Mars but have fallen on Earth. The 99 Martian meteorites known at the time of writing represent less than 0.2% of all known meteorites. It is possible to pinpoint a meteorite as being from Mars by its...

 

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