Credit & Copyright: ESA/Hubble &
NASA
Explanation:
Why does this galaxy have a ring of bright blue stars?
Beautiful island universe
Messier 94 lies a mere 15 million light-years
distant in the northern constellation of the Hunting Dogs
(Canes
Venatici).
A popular target for
Earth-based astronomers,
the face-on spiral galaxy is about 30,000
light-years across,
with spiral arms sweeping through the
outskirts of its broad disk.
But this Hubble Space Telescope field of view spans about
7,000 light-years across
M94's central region.
The featured close-up highlights the galaxy's compact,
bright nucleus, prominent inner
dust lanes, and the
remarkable
bluish ring of young massive stars.
The ring stars are all likely less than 10 million
years old, indicating that M94 is a
starburst
galaxy that is experiencing an epoch of rapid star formation
from inspiraling gas.
The circular ripple of blue stars is likely a
wave propagating outward, having been
triggered by the gravity and rotation of a
oval matter distributions.
Because M94 is relatively nearby,
astronomers can better explore
details of its starburst ring.
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 94 - starburst galaxy - вспышка звездообразования
Публикации со словами: M 94 - starburst galaxy - вспышка звездообразования | |
См. также:
Все публикации на ту же тему >> | |
