Harlow Shapley found the Milky Way was: much larger than previously thought. Galactic disks appear blue because: They believed that the Milky Way was the entire universe. Read More

A Taurus born on April 24 is a sleek, sophisticated individual with a flair for the good life and a love of glamor. They are also talented, with a good sense of humor and the ability to laugh at themselves. Read More

The easiest way to find Orion is to go outside in the evening and look in the southwest sky if you are in the northern hemisphere or the northwestern sky if you are in the southern hemisphere. If you live on or near the equator, he will be visible in the western sky. Read More

Tritium is a fast-decaying radioelement of hydrogen which occurs only in trace quantities in nature. It can be produced during the fusion reaction through contact with lithium, however: tritium is produced, or "bred," when neutrons escaping the plasma interact with lithium contained in the blanket wall of the tokamak. Read More

Orion Arm Earth is located in one of the spiral arms of the Milky Way (called the Orion Arm) which lies about two-thirds of the way out from the center of the Galaxy. Here we are part of the Solar System - a group of eight planets, as well as numerous comets and asteroids and dwarf planets which orbit the Sun. Read More

Class 3 lasers are medium power lasers or laser systems that require control measures to prevent viewing of the direct beam. Control measures emphasize preventing exposure of the eye to the primary or specularly reflected beam. Read More

4 billion years ago, the moon was a bit closer and Earth's rotation was faster - a day on Earth was just over 18 hours. Read More

The whole surface of the Moon is a bit bigger than Africa. This is because even though the Sun is much bigger than the Moon, it is also much further away from the Earth. Read More

Useful Links