Sao Thiên Lang vs sao Chức Nữ
| Property |
Sao Thiên Lang |
sao Chức Nữ |
| Ký Hiệu |
9Alp CMa |
3Alp Lyr |
| Chòm Sao |
Canis Major |
Lyra |
| Phân Loại Quang Phổ |
Class A — A-type (White) |
Class A — A-type (White) |
| Cấp Sao Biểu Kiến |
-1.44 |
+0.03 |
| Cấp Sao Tuyệt Đối |
1.45 |
0.60 |
| Khoảng Cách |
8.6 ly |
25.0 ly |
| Khối Lượng |
N/A |
N/A |
| Bán Kính |
N/A |
N/A |
| Nhiệt Độ |
N/A |
N/A |
| Độ Sáng |
N/A |
N/A |
Key Differences
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Both are brilliant white A-type stars and among the most prominent in the northern sky.
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Sirius is the brightest star overall at magnitude −1.46; Vega is the fifth-brightest at magnitude 0.03.
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Sirius is 8.6 light-years away; Vega is 25 light-years from the Sun.
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Vega was the original zero-point for stellar magnitude; Sirius sets the scale of brightness.
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Sirius has a white dwarf companion; Vega has a prominent debris disk but no known companion.