Credit & Copyright: Bill Snyder
(Bill
Snyder Photography)
Explanation:
The first hint of what will become of our
Sun was discovered inadvertently in
1764.
At that time,
Charles Messier was compiling a list
of diffuse objects not to be confused with comets.
The 27th object on
Messier's list, now known as
M27 or the Dumbbell Nebula, is a
planetary nebula,
the type of nebula our
Sun will produce when
nuclear fusion stops in its core.
M27 is one of the brightest
planetary nebulae on the sky,
and can be seen toward the constellation
of the Fox (Vulpecula) with binoculars.
It takes light about 1000 years to reach us from M27,
shown above in colors emitted by
hydrogen and
oxygen.
Understanding the physics and significance of
M27
was well beyond 18th century science.
Even today, many things remain mysterious about
bipolar planetary nebula like
M27, including the physical mechanism that expels a
low-mass star's gaseous outer-envelope, leaving an
X-ray hot white dwarf.
Best Short Astronomy Videos:
APOD editor to speak in New York City on Friday, January 6
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:
M 27 - planetary nebula - dumbbell nebula - Планетарная туманность - Туманность Гантель
Публикации со словами: M 27 - planetary nebula - dumbbell nebula - Планетарная туманность - Туманность Гантель | |
См. также:
Все публикации на ту же тему >> | |
Мнение читателя [1]
