Editing Pisces (constellation) (section)

=== Deep-sky objects ===

[[Messier 74|M74]] is a loosely wound (type Sc) [[spiral galaxy]] in Pisces, found at a distance of 30 million light years ([[redshift]] 0.0022). It has many clusters of young stars and the associated [[nebula]]e, showing extensive regions of [[star formation]]. It was discovered by [[Pierre Méchain]], a French astronomer, in 1780. A [[type II-P supernova]] was discovered in the outer regions of M74 by [[Robert Evans (astronomer)|Robert Evans]] in June 2003; the star that underwent the supernova was later identified as a [[red supergiant]] with a mass of 8 [[solar mass]]es.<ref name="Wilkins Dunn 2006" /> It is the brightest member of the [[M74 Group]].<ref>
{{cite book
 | author=R. B. Tully
 | date=1988
 | title=Nearby Galaxies Catalog
 | publisher=[[Cambridge University Press]]
 | isbn=978-0-521-35299-4
}}</ref><ref name="garcia1993">
{{cite journal
 | author=A. Garcia
 | date=1993
 | title=General study of group membership. II – Determination of nearby groups
 | journal=[[Astronomy and Astrophysics Supplement]]
 | volume=100 | pages=47–90
 | bibcode=1993A&AS..100...47G
}}</ref><ref name="giuricinetal2002">
{{cite journal
 | author=G. Giuricin | author2=C. Marinoni | author3=L. Ceriani | author4=A. Pisani
 | date=2000
 | title=Nearby Optical Galaxies: Selection of the Sample and Identification of Groups
 | journal=[[Astrophysical Journal]]
 | volume=543
 | issue=1 | pages=178–194
 | bibcode=2000ApJ...543..178G
 | doi=10.1086/317070
|arxiv = astro-ph/0001140 | s2cid=9618325 }}</ref>

[[NGC 488]] is an isolated face-on prototypical spiral galaxy.<ref>{{cite journal|last1=Sil'chenko, O. K.|title=Chemically decoupled nucleus and the structure of the nuclear region in the spiral galaxy NGC 488|journal=Astronomy Letters|date=March 1999|volume=25|issue=3|pages=140–8|url=http://cdsads.u-strasbg.fr/abs/1999AstL...25..140S|access-date=29 December 2015|bibcode = 1999AstL...25..140S }}</ref> Two supernovae have been observed in the galaxy.<ref>[http://www.cbat.eps.harvard.edu/lists/Supernovae.html List of Supernovae] ''[[IAU]] Central Bureau for Astronomical Telegrams''. Retrieved 29 December 2015.</ref>

[[NGC 520]] is a pair of colliding galaxies located 105 million light-years away.<ref name=NGC520dist>{{cite journal
 | last1=Cappellari | first1=Michele | last2=Emsellem | first2=Eric
 | last3=Krajnović | first3=Davor | last4=McDermid | first4=Richard M.
 | last5=Scott | first5=Nicholas | last6=Verdoes Kleijn | first6=G. A.
 | last7=Young | first7=Lisa M. | last8=Alatalo | first8=Katherine
 | last9=Bacon | first9=R. | last10=Blitz | first10=Leo
 | last11=Bois | first11=Maxime | last12=Bournaud | first12=Frédéric
 | last13=((Bureau)) | first13=M. | last14=Davies | first14=Roger L.
 | last15=Davis | first15=Timothy A. | last16=de Zeeuw | first16=P. T.
 | last17=Duc | first17=Pierre-Alain | last18=Khochfar | first18=Sadegh
 | last19=Kuntschner | first19=Harald | last20=Lablanche | first20=Pierre-Yves
 | last21=Morganti | first21=Raffaella | last22=Naab | first22=Thorsten
 | last23=Oosterloo | first23=Tom | last24=Sarzi | first24=Marc
 | last25=Serra | first25=Paolo | last26=Weijmans | first26=Anne-Marie
 | title=The ATLAS<sup>3D</sup> project - I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria
 | display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society
 | volume=413 | issue=2 | pages=813–836 | date=May 2011
 | arxiv=1012.1551 | bibcode=2011MNRAS.413..813C
 | doi=10.1111/j.1365-2966.2010.18174.x | doi-access=free | s2cid=15391206 }}</ref>

CL 0024+1654 is a massive [[galaxy cluster]] that [[gravitational lensing|lenses]] the galaxy behind it, creating arc-shaped images of the background galaxy. The cluster is primarily made up of yellow [[elliptical galaxy|elliptical]] and spiral galaxies, at a distance of 3.6 billion light-years from Earth (redshift 0.4), half as far away as the background galaxy, which is at a distance of 5.7 billion light-years (redshift 1.67).<ref name="Wilkins Dunn 2006" />
<ref>{{cite book|last1 = Wilkins |first1 = Jamie |last2 = Dunn |first2 = Robert |date = 2006 |title = 300 Astronomical Objects: A Visual Reference to the Universe
 |edition = 1st |publisher = Firefly Books |location = Buffalo, New York |isbn = 978-1-55407-175-3}}</ref>

[[3C 31]] is an [[active galaxy]] and [[Astronomical radio source|radio source]] in Perseus 237 million light-years from Earth (redshift 0.0173). Its jets, caused by the [[supermassive black hole]] at its center, extend several million light-years in opposing directions, making them some of the largest objects in the universe.