폴라리스 vs 베가
| 속성 | 폴라리스 | 베가 |
|---|---|---|
| 명칭 | 1Alp UMi | 3Alp Lyr |
| 별자리 | N/A | Lyra |
| 분광형 | Class F — F-type (Yellow-White) | Class A — A-type (White) |
| 겉보기 등급 | +1.97 | +0.03 |
| 절대 등급 | -3.64 | 0.60 |
| 거리 | 433 ly | 25.0 ly |
| 질량 | N/A | N/A |
| 반지름 | N/A | N/A |
| 온도 | N/A | N/A |
| 광도 | N/A | N/A |
주요 차이점
- ◆ 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.