Betelgeuse vs Sao Thiên Lang

Property Betelgeuse Sao Thiên Lang
Ký Hiệu 58Alp Ori 9Alp CMa
Chòm Sao Orion Canis Major
Phân Loại Quang Phổ Class M — M-type (Red) Class A — A-type (White)
Cấp Sao Biểu Kiến +0.45 -1.44
Cấp Sao Tuyệt Đối -5.47 1.45
Khoảng Cách 498 ly 8.6 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

  • Sirius is an A-type main-sequence star; Betelgeuse is an M-type red supergiant nearing the end of its life.
  • Betelgeuse has a radius of ~887 R☉ — over 500 times larger than Sirius at 1.71 R☉.
  • Sirius is only 8.6 light-years away; Betelgeuse is about 700 light-years distant.
  • Betelgeuse is luminosity-dominant at ~126,000 L☉ versus Sirius at 25.4 L☉.
  • Sirius is the brightest star in the night sky; Betelgeuse is a famous supernova candidate.

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