Astrobiology Glossary

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z
Term Definition
X-Rays Electromagnetic radiation with very short wavelengths and very high energies and frequencies. X-rays fall between gamma rays and ultraviolet radiation; also called X-radiation or Roentgen ray.

redOrbit Friends

Quote of the Day

Sometimes I think we're alone in the universe, and sometimes I think we're not. In either case the idea is quite staggering.
- Arthur C. Clarke

Quiz Me

What was the first nearly complete dinosaur discovered in America?
A.Tyrannosaurus
B.Apatosaurus
C.Triceratops
D.Hadrosaurus
or View Results

Fact of the Day

Many parts of a tree can die without killing the whole tree. In fact, much of a normal, healthy tree is dead -- the wood in the center, for example.

Word of the Day

do-si-do
Pronunciation: /DOE-see-doe/
n : a dance step in square dancing in which two facing partners approach each other and circle back to back, returning to their original positions.
"She did a do-si-do around the lectern after she picked up her award."