Supernova
Kes 75 (SNR G29.7-0.3)
Supernova remnant
The shock wave of a supernova expanding at thousands of kilometres per second: it sweeps up and heats the interstellar gas and shines in radio waves.
| Type | Supernova |
|---|---|
| Constellation | Aquila |
| Distance | 5,800 pc (18.9 thousand ly) |
| Diameter | 16.5 ly |
| Type | Composite (shell + pulsar wind nebula) |
| Radio flux (1 GHz) | 10 Jy |
| Source | Green's SNR Catalogue |
| Right ascension (J2000) | 18h 46m 25.0s |
| Declination (J2000) | −2° 58′ 59″ |
In the sky
Visible from the whole Southern Hemisphere and north to latitude 87° N. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 19 thousand years ago. At that time Homo sapiens was spreading out of Africa; there was no farming yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 336 million years.