Rambler's Top100Astronet    
  po tekstam   po klyuchevym slovam   v glossarii   po saitam   perevod   po katalogu
 

Comet Halleys Nucleus: An Orbiting Iceberg
<< Yesterday 4.01.2010 Tomorrow >>
Comet Halleys Nucleus: An Orbiting Iceberg
Credit & Copyright: Halley Multicolor Camera Team, Giotto Project, ESA
Explanation: What does a comet nucleus look like? Formed from the primordial stuff of the Solar System, comet nuclei were thought to resemble very dirty icebergs. But ground-based telescopes revealed only the surrounding cloud of gas and dust of active comets nearing the Sun, clearly resolving only the comet's coma, and the characteristic cometary tails. In 1986, however, the European spacecraft Giotto became one of the first group of spacecraft ever to encounter and photograph the nucleus of a comet, passing and imaging Halley's nucleus as it approached the sun. Data from Giotto's camera was used to generate this enhanced image of the potato shaped nucleus that measures roughly 15 kilometers across. Some surface features on the dark nucleus are on the right, while gas and dust flowing into Halley's coma are on the left. Every 76 years Comet Halley returns to the inner solar system and each time the nucleus sheds about a 6-meter deep layer of its ice and rock into space. This debris shed from Halley's nucleus eventually disperses into an orbiting trail responsible for the Orionids meteor shower, in October of every year, and the Eta Aquariids meteor shower every May.


Note: An APOD editor will review astronomy images of 2009,
hosted by the Amateur Astronomers Association of New York on Friday, January 8 at the American Museum of Natural History, NYC.

<<  Yanvar'  >>
Pn Vt Sr Cht Pt Sb Vs
        1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31
1995   1996   1997
1998   1999   2000
2001   2002   2003
2004   2005   2006
2007   2008   2009
2010   2011   2012
2013   2014   2015
2016   2017   2018
2019   2020   2021
2022   2023   2024
Yanvar'
Fevral'
Mart
Aprel'
Mai
Iyun'
Iyul'
Avgust
Sentyabr'
Oktyabr'
Noyabr'
Dekabr'
Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (USRA)
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.

Russkii tekst
Based on Astronomy Picture Of the Day
Publikacii s klyuchevymi slovami: komety - koma - kometa Galleya - yadro komety
Publikacii so slovami: komety - koma - kometa Galleya - yadro komety
Sm. takzhe:
Vse publikacii na tu zhe temu >>

Mneniya chitatelei [2]
Ocenka: 3.1 [golosov: 150]
 
O reitinge
Versiya dlya pechati Raspechatat'

Astronet | Nauchnaya set' | GAISh MGU | Poisk po MGU | O proekte | Avtoram

Kommentarii, voprosy? Pishite: info@astronet.ru ili syuda

Rambler's Top100 Yandeks citirovaniya