MACS 2129-1

MACS 2129-1 is an early universe so-called 'dead' disk galaxy discovered in 2017 by the Hubble Space Telescope from NASA.^[2] It lies approximately 10 billion light-years away from Earth (current distance 18 billion light years) .^[3][4] MACS 2129-1 has been described as 'dead' as it has ceased making new stars.

ConstellationAquarius

Right ascension21^h 29^m 22.20^s[1]

Declination−07° 41′ 31.2″^[1]

Redshift2.15^[1]

Quick facts Observation data (J2000 epoch), Constellation ...

MACS 2129-1
Image of MACS 2129-1 as seen by the Hubble Space Telescope.
Observation data (J2000 epoch)
Constellation	Aquarius
Right ascension	21h 29m 22.20s[1]
Declination	−07° 41′ 31.2″[1]
Redshift	2.15[1]
Heliocentric radial velocity	244,898 km/s[1]
Distance	~ 10 billion ly (3.1 billion pc) (light travel distance) 18 billion ly (5.5 billion pc) (present proper distance)
Apparent magnitude (V)	23.8
Characteristics
Type	Disc galaxy
Size	~50,000 ly (diameter)
Other designations
[GRM2013] MACS J2129-0741 1

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