Astrobiology Glossary

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Term Definition
Quark A basic building block of protons, neutrons, and other elementary particles.
Quasar The brightest type of active galactic nucleus, believed to be powered by a supermassive black hole. The word 'quasar' is derived from quasi-stellar radio source, because this type of object was first identified as a kind of radio source. Quasars also are called quasi-stellar objects (QSOs). Thousands of quasars have been observed, all at extreme distances from our galaxy.


Oct 6, 2008, 9:45 am
A Workout for the Eyes

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The Heart Beats On

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War Veterans Going Blind

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Invisible Hearing Aids

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New Drug Saves Eyesight


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Quote of the Day

Anyone who has never made a mistake has never tried anything new.
- Albert Einstein

Quiz Me

Which order is the bat classified in?
A.Rodentia
B.Artiodactyla
C.Hyracoidae
D.Chiroptera
or View Results

Fact of the Day

The primary purpose of growing rice in flooded paddies is to drown the weeds surrounding the young seedlings -- rice can, in fact, be grown in drained areas.


Word of the Day

venal
Pronunciation: /VEE-nul/
adj : capable of or characterized by bribery or corruption
"Unfortunately, venal policemen and venal politicians are common stories on the news."