NGC 7603 is a spiral Seyfert galaxy in the constellation Pisces.^[1] It is listed (as Arp 92) in the Atlas of Peculiar Galaxies.^[4] It is interacting with the smaller elliptical galaxy PGC 71041 nearby.^[1]

NGC 7603
The spiral Seyfert galaxy NGC 7603 Credit: Hubble Space Telescope
Observation data (J2000.0 epoch)
Constellation	Pisces
Right ascension	23h 18m 56.4s[1]
Declination	+00° 14′ 38.2″[1]
Redshift	0.029524±0.000073[1]
Heliocentric radial velocity	8851±22 km/s[1]
Galactocentric velocity	8978±22 km/s[1]
Distance	412.9 ± 28 Mly (126.60 ± 8.58 Mpc)[2]
Apparent magnitude (V)	14.04[1]
Characteristics
Type	SA(rs)b: pec Sy1.5[1]
Apparent size (V)	1.5 × 1.0 moa[1]
Other designations
NGC 7603, UGC 12493, MCG 0-59-21, MK 530, PGC 71035, IRAS23163-0001, UM 156, ARP 92, ZWG 380.26[3]
References: NGC+7603[1]

This galaxy pair has long been a cornerstone for those who are critical of the view that the universe is expanding, and advocates for non-standard cosmology such as Halton Arp, Fred Hoyle, and others.^{[like whom?][5][6]} This is due to the position of two quasars, one at each edge of the filament connecting the two galaxies, with much more redshift than either galaxy.