Galaxy · Barred spiral
NGC 7157
NGC 7157 is a galaxy in the direction of the constellation Piscis Austrinus, 407.9 million light-years away.
| Type | Barred spiral (estimated) |
|---|---|
| Constellation | Piscis Austrinus |
| Distance | 407.9 million light-years (125.06 Mpc) |
| Diameter | 116,200 light-years · 1.3 × the Milky Way |
| Absolute magnitude | magnitude −21.43 |
| Apparent magnitude | magnitude 14.06 |
| Luminosity | 1.6 × the Milky Way |
| Right ascension (J2000) | 21h 56m 56.7s |
| Declination (J2000) | −25° 21′ 02″ |
| Source | 2MASS Redshift Survey (Huchra et al. 2012) |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.06. Visible from the whole Southern Hemisphere and north to latitude 65° N. South of latitude 65° S it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 408 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 7,235.7 billion years.