Credit & Copyright: Anglo-Australian Telescope Board
Explanation:
NGC 2997 is a grand
design
spiral galaxy. Its small nucleus and sprawling spiral arms give
it a type
"Sc"
designation. NGC 2997
is speeding away from us at about 1100 kilometers per second,
which would place it at about 55 million light years distant,
given current estimates of the expansion rate of our universe.
NGC 2997 is thought to have a mass of about 100 billion times
that of our Sun, but is probably
less massive than our own Milky Way Galaxy.
NGC 2997
is not seen face-on - it is thought tilted by about 45 degrees.
NGC 2997 is particularly notable for a nucleus surrounded by a chain of hot giant clouds of ionized hydrogen.
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:
spiral galaxy - спиральная структура - спиральная галактика - области ионизованного водорода
Публикации со словами: spiral galaxy - спиральная структура - спиральная галактика - области ионизованного водорода | |
См. также:
Все публикации на ту же тему >> |