Credit & Copyright: R Jay Gabany
(Blackbird Observatory) - collaboration;
D.Martinez-Delgado(IAC,
MPIA),
J.Penarrubia (U.Victoria) I. Trujillo (IAC) S.Majewski (U.Virginia), M.Pohlen (Cardiff)
Explanation:
Grand tidal streams of stars seem to surround galaxy
NGC 5907.
The arcing structures form tenuous loops extending more than 150,000
light-years from the narrow, edge-on spiral, also known as the
Splinter
or Knife Edge Galaxy.
Recorded only in very deep exposures, the streams likely represent
the ghostly trail of a
dwarf
galaxy - debris left along the
orbit of a smaller satellite galaxy that was
gradually
torn apart and merged with NGC 5907 over four billion years ago.
Ultimately this remarkable discovery image, from a small robotic
observatory in New Mexico, supports the cosmological
scenario in
which large spiral galaxies,
including
our own Milky Way, were
formed by the accretion of smaller ones.
NGC 5907 lies about 40 million light-years distant in the northern
constellation
Draco.
J.Penarrubia (U.Victoria) I. Trujillo (IAC) S.Majewski (U.Virginia), M.Pohlen (Cardiff)
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:
NGC 5907 - spiral galaxy - спиральная галактика - merging galaxies
Публикации со словами: NGC 5907 - spiral galaxy - спиральная галактика - merging galaxies | |
См. также:
Все публикации на ту же тему >> | |
Мнения читателей [4]
