Credit & Copyright: Sally Hunsberger
(Lowell Obs.),
Jane Charlton
(Penn State) et al.;
Data: Hubble Legacy Archive; Processing: Robert Gendler
Explanation:
Sometimes galaxies form groups. For example, our own
Milky Way Galaxy is part of the
Local Group of Galaxies.
Small, compact groups, like Hickson Compact Group 87
(HCG 87)
shown above, are interesting partly because they slowly self-destruct.
Indeed, the galaxies of
HCG 87 are gravitationally
stretching each other during their 100-million year
orbits around a common center.
The pulling creates colliding gas that causes bright bursts of
star formation and feeds matter into their
active galaxy centers.
HCG 87
is composed of a large
edge-on
spiral galaxy visible on the lower left, an
elliptical galaxy
visible on the lower right, and a
spiral galaxy visible near the top.
The small spiral near the center might be far in the distance.
Several stars from
our Galaxy are also visible in the foreground.
The above picture was taken in 1999 July by the
Hubble Space Telescope's
Wide Field Planetary Camera 2.
Studying groups like HCG 87 allows insight into how all
galaxies form and evolve.
Data: Hubble Legacy Archive; Processing: Robert Gendler
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:
group of galaxies - HCG 87 - Hickson - группа галактик
Публикации со словами: group of galaxies - HCG 87 - Hickson - группа галактик | |
См. также:
Все публикации на ту же тему >> | |
Мнения читателей [9]
