Credit & Copyright: MPAE
Explanation:
What
does a
comet nucleus look like?
Formed from the
primordial stuff
of the solar system, it is thought to resemble a very dirty iceberg.
But for active comets,
telescopic images only reveal the surrounding cloud of gas and dust, the
comet's coma, and
the characteristic cometary tails.
In 1986, the
European spacecraft Giotto
encountered the nucleus of
Halley's comet as it approached the sun.
Data from Giotto's camera was used to generate
this enhanced image of the potato shaped nucleus which
measures roughly 15 kilometers across.
It shows surface features on the dark nucleus
against the bright background of the coma as the icy
material is vaporized by the Sun's heat.
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 composes Halley's tails
and leaves an orbiting trail
responsible for the Orionids
meteor shower.
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 |
Январь Февраль Март Апрель Май Июнь Июль Август Сентябрь Октябрь Ноябрь Декабрь |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
|
Публикации с ключевыми словами:
волокна - нейтронные звезды - nucleus - comet nucleus - comet Halley - ядро кометы - комета Галлея - Крабовидная туманность
Публикации со словами: волокна - нейтронные звезды - nucleus - comet nucleus - comet Halley - ядро кометы - комета Галлея - Крабовидная туманность | |
См. также:
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