Supernova
Tycho (SN 1572) (SNR G120.1+1.4)
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 | Cassiopeia |
| Distance | 2,500 pc (8.2 thousand ly) |
| Diameter | 19.0 ly |
| Type | Shell type |
| Radio flux (1 GHz) | 56 Jy |
| Source | Green's SNR Catalogue |
| Right ascension (J2000) | 0h 25m 18.0s |
| Declination (J2000) | +64° 09′ 00″ |
In the sky
Visible from the whole Northern Hemisphere and south to latitude 26° S. North of latitude 26° 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 8,154 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 145 million years.