Polarstern vs Wega
| Eigenschaft | Polarstern | Wega |
|---|---|---|
| Bezeichnung | 1Alp UMi | 3Alp Lyr |
| Sternbild | N/A | Lyra |
| Spektralklasse | Class F — F-type (Yellow-White) | Class A — A-type (White) |
| Scheinbare Helligkeit | +1.97 | +0.03 |
| Absolute Helligkeit | -3,64 | 0,60 |
| Entfernung | 433 ly | 25.0 ly |
| Masse | N/A | N/A |
| Radius | N/A | N/A |
| Temperatur | N/A | N/A |
| Leuchtkraft | N/A | N/A |
Wesentliche Unterschiede
- ◆ Polaris is an F-type Cepheid variable supergiant; Vega is a stable A-type main-sequence star.
- ◆ Polaris is 431 light-years away; Vega is much closer at 25 light-years.
- ◆ Polaris sits near the north celestial pole and has guided navigators for centuries; Vega was the pole star ~14,000 years ago.
- ◆ Vega served as the original zero-magnitude reference for the photometric system.
- ◆ Polaris pulsates in brightness; Vega has a debris disk suggesting a forming planetary system.