| MACS 2129-1 | |
|---|---|
| Observation data (J2000epoch) | |
| 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) (presentproper distance) |
| Apparent magnitude (V) | 23.8 |
| Characteristics | |
| Type | Disc galaxy |
| Size | ~50,000 ly (diameter) |
| Other designations | |
| [GRM2013] MACS J2129-0741 1 | |
MACS 2129-1 is an early universe so-called 'dead'disk galaxy discovered in 2017 by theHubble Space Telescope fromNASA.[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.
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