Planetary nebula
He 2- 73
Planetary nebula
A shell of gas thrown off by a dying Sun-like star, glowing in the ultraviolet light of the hot core at its centre. Within a few tens of thousands of years it will disperse and fade from view. The distance is a statistical estimate, uncertain by 30–50 %.
| Type | Planetary nebula |
|---|---|
| Constellation | Musca |
| Distance | 2,600 pc (8.5 thousand ly) · estimated |
| Diameter | 0.2 ly |
| Central star | V 16.1 |
| PN G name | PN G296.3-03.0 |
| Source | Strasbourg–ESO PN Catalogue |
| Right ascension (J2000) | 11h 48m 38.7s |
| Declination (J2000) | −65° 08′ 34″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 25° N. South of latitude 25° S it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 8,480 years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 150 million years.