3 results for: Halley's comet Browse Nearby Entries
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
Halley's comet    Audio Help   [hal-eez or, sometimes, hey-leez] Pronunciation Key
–noun
a comet with a period averaging 76 years. In this century it was visible to terrestrial observers just before and after reaching perihelion in 1910 and again in 1986.

[Origin: named after Edmund Halley, who first predicted its return]

The common pronunciation for both the comet and the astronomer after whom it is named is    Audio Help   [hal-ee] Pronunciation Key. This is the pronunciation usually recommended by astronomers. However, several variant spellings of the name, including Hailey, Haley, and Hawley, were used interchangeably during the astronomer's own time, a period when spellings even of proper names were not yet fixed, and corresponding pronunciations have survived. The pronunciation    Audio Help   [hey-lee] in particular remains associated with Halley's comet; it is less likely to be heard as a pronunciation of Edmund Halley.
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
Encyclopædia Britannica, Inc.
Halley's comet

To learn more about Halley's comet visit Britannica.com

© 2008 Encyclopædia Britannica, Inc.
American Heritage Dictionary - Cite This Source - Share This
Hal·ley's comet    Audio Help   (hāl'ēz, hā'lēz)  Pronunciation Key 
n.   A comet with a period of approximately 76 years. The first comet for which a return was successfully predicted, it last appeared in 1986.


[After Edmund Halley.]

(Download Now or Buy the Book)
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
The American Heritage Science Dictionary - Cite This Source - Share This
Halley's comet    Audio Help   (hāl'ēz, hā'lēz)  Pronunciation Key 
A short-period comet that orbits the Sun once every 76 years. It is visible to the unaided eye and last appeared in 1986, when close observation by spacecraft showed that its nucleus measures about 16 km (10 mi) by 8 km (5 mi) and is composed of water ice, stony minerals, and organic compounds. Its next appearance will be in the year 2061.

The American Heritage® Science Dictionary
Copyright © 2002 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Browse Nearby Entries:

halleck, henry wager
hallel
hallel's
hallels
hallels'
halleluiah
hallelujah
hallelujah's
hallelujahs
hallelujahs'
hallelujatic
haller
haller's circle
haller, albrecht von
hallervorden-spatz syndro..
halley
halley's comet
halley, edmond
halley, edmund
halleys comet
halli
halliard
halliard's
halliards
halliards'
hallidome
hallie
hallier
halling
hallion's test
hallmark
hallmark's
hallmarked

View results from: Dictionary | Thesaurus | Encyclopedia | All Reference | the Web

Share This:   Share This: del.icio.usShare This: digg.comShare This: FacebookShare This: furl.netShare This: www.netscape.comShare This: myweb2.search.yahoo.comShare This: www.stumbleupon.comShare This: www.google.comShare This: www.technorati.comShare This: blinklist.comShare This: newsvine.comShare This: ma.gnolia.comShare This: reddit.comShare This: favorites.live.com

Perform a new search, or try your search for "Halley's comet" at: