Abell 2029

Abell 2029 or A2029 is a large cluster of galaxies 1 billion light years away in the constellation Virgo.^[3][4]

Abell 2029 cluster
Observation data (Epoch J2000)
Constellation(s)	Virgo
Right ascension	15h 10m 56.20s
Declination	+05° 44′ 41″
Brightest member	IC 1101
Redshift	0.0767[1]
Distance (co-moving)	326 Mpc (1,063 Mly) h−1 0.705 [2]
Binding mass	8×1014 M☉
X-ray flux	6.94×10−11 erg s-1 cm-2 (0.1-2.4 keV)[2]
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Its central galaxy, IC 1101, is the largest galaxy known. Estimates ranging from 5.6 to over 6 million light years across. Contrast this with the Milky Way, which is 200,000 light years across.

A2029 is also about 81 times bigger than the Milky Way, with a luminosity of 2×10¹² L_☉. This type of galaxy may have grown to its large size by accreting nearby galaxies.