Credit & Copyright: J-P Metsävainio
(Astro Anarchy)
Explanation:
Cast off by dying sunlike stars,
planetary nebulae
are a brief but glorious final phase of stellar evolution.
The gaseous shrouds are ionized by an extremely hot central source,
the shrinking core of a star running out of
fuel for nuclear fusion.
Shining in the cosmic night, their simple
symmetries
are fascinating and have inspired this
planetary nebula poster project.
In it, nine planetaries are displayed for comparison in a 3x3 grid.
Of course, planetary nebula fans should be able to
pick out the bright
Messier objects
M27 - the Dumbbell Nebula,
M76 - the Little Dumbbell, and
M57 - the Ring Nebula, as well as
NGC 6543, aka the Cat's Eye Nebula.
Lesser known nebulae include the
Medusa and the
Bug.
All the images were made with detailed narrow band data and
are shown at the same
angular scale,
spanning 20 arc minutes (1/3 degree).
At that scale, the grey circle represents the apparent size of
the Full Moon.
These planetary nebulae
hint at the fate of our own
Sun as its core runs out of nuclear fuel in another
5 billion years.
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:
planetary nebula - stellar evolution - gas - Планетарная туманность - Эволюция звезд - газ
Публикации со словами: planetary nebula - stellar evolution - gas - Планетарная туманность - Эволюция звезд - газ | |
См. также:
Все публикации на ту же тему >> | |
