Galaxy · Spiral
NGC 7729
NGC 7729 is a galaxy in the direction of the constellation Pegasus, 244.7 million light-years away.
| Type | Spiral |
|---|---|
| Constellation | Pegasus |
| Distance | 244.7 million light-years (75.01 Mpc) |
| Diameter | 140,000 light-years · 1.6 × the Milky Way |
| Absolute magnitude | magnitude −21.76 |
| Apparent magnitude | magnitude 12.62 |
| Luminosity | 2.2 × the Milky Way |
| Right ascension (J2000) | 23h 40m 33.6s |
| Declination (J2000) | +29° 11′ 18″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.62. Visible from the whole Northern Hemisphere and south to latitude 61° S. North of latitude 61° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 245 million years ago. At that time complex animals were spreading through the seas and over the land; there were no dinosaurs yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4,339.9 billion years.