Planetary nebula
He 2- 77
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 | Crux |
| Distance | 753 pc (2.5 thousand ly) · estimated |
| Diameter | 0.3 ly |
| PN G name | PN G298.1-00.7 |
| Source | Strasbourg–ESO PN Catalogue |
| Right ascension (J2000) | 12h 09m 01.2s |
| Declination (J2000) | −63° 07′ 06″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 27° N. South of latitude 27° 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 around 431 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 44 million years.