H? sao

H? sao ho?c h? th?ng sao la s? l??ng nh? cac ngoi sao cung m?t qu? đ?o, ^[1] va b? rang bu?c b?i l?c h?p d?n . M?t s? l??ng l?n cac ngoi sao b? rang bu?c b?i l?c h?p d?n th??ng đ??c g?i la m?t c?m sao hay thien ha , tuy nhien n?u noi chung ng??i ta v?n g?i la cac h? sao.

Cac h? sao đoi [ s?a | s?a ma ngu?n ]

H? sao co 2 ngoi sao đ??c xem la h? sao đoi . N?u khong co cac tac đ?ng c?a l?c th?y tri?u, khong co s? chuy?n đ?i kh?i l??ng t? ngoi sao nay sang ngoi sao kia, khong co s? xao tr?n b?i cac l?c t??ng tac khac, qu? đ?o c?a 2 ngoi sao la m?t qu? đ?o tuy?t đ?i theo th?i gian.

M?t s? h? sao đoi đo la Sirius , Procyon va Cygnus X-1 . Ngoai ra, h? sao đoi con co d?ng đ?c bi?t đo la s? k?t h?p c?a m?t ngoi sao va m?t l? đen .

Cac h? sao đi?n hinh [ s?a | s?a ma ngu?n ]

H? sao đoi [ s?a | s?a ma ngu?n ]

Sirius , m?t sao đ?i ch?a m?t sao lo?i A va m?t sao lun tr?ng .
Procyon , t??ng t? Sirius.
H? sao Mira , h? sao bi?n (variable star)
Delta Cephei , h? sao bi?n cepheid
Epsilon Aurigae , h? sao đoi eclipse

H? ba sao [ s?a | s?a ma ngu?n ]

H? b?n sao [ s?a | s?a ma ngu?n ]

4 Centauri ^[4]
Mizar la sao đoi đ??c kham pha đ?u tien vao n?m 1650 b?i Giovanni Battista Riccioli ^[5]^tr.1^[6] nh?ng no đ??c quan sat l?i b?i Benedetto Castelli va Galileo . ^{[
c?n d?n ngu?n
]} Sau đo, quang ph? c?a cac thanh ph?n c?a h? sao la Mizar A va B cho th?y chung la 2 h? sao đoi con. ^[7]
HD 98800

H? n?m sao [ s?a | s?a ma ngu?n ]

91 Aquarii ^{[
Con m? h?

–
th?o lu?n
]}
Delta Orionis

H? sau sao [ s?a | s?a ma ngu?n ]

Castor ^[8]
HD 139691 ^[9]
N?u Alcor đ??c xem la m?t ph?n c?a h? sao Mizar thi toan b? chung co th? xem la h? sau sao.

H? b?y sao [ s?a | s?a ma ngu?n ]

Nu Scorpii ^[10]

Tham kh?o them [ s?a | s?a ma ngu?n ]

Tham kh?o [ s?a | s?a ma ngu?n ]

^ "Star system" in Modern Dictionary of Astronomy and Space Technology . A.S. Bhatia, ed. New Delhi: Deep & Deep Publications, 2005. ISBN 81-7629-741-0
^ Are Proxima and α Centauri Gravitationally Bound? , Jeremy G. Wertheimer, Gregory Laughlin, Astronomical Journal 132 , #5 (November 2006), pp. 1995–1997.
^ Does triple star orbit directly affect orbit time , Jeremy Hien, Jon Shewarts, Astronomical News 132 , #6 (November 2011)
^ 4 Centauri L?u tr? 2011-06-15 t?i Wayback Machine , entry in the Multiple Star Catalog L?u tr? 2021-02-14 t?i Wayback Machine .
^ The Binary Stars , R. G. Aitken, New York: Semi-Centennial Publications of the University of California, 1918.
^ Vol. 1, part 1, p. 422, Almagestum Novum L?u tr? 2011-08-10 t?i Wayback Machine , Giovanni Battista Riccioli, Bononiae: Ex typographia haeredis Victorij Benatij, 1651.
^ A New View of Mizar L?u tr? 2008-03-07 t?i Wayback Machine , Leos Ondra, accessed on line ngay 26 thang 5 n?m 2007.
^ Castor A and Castor B resolved in a simultaneous Chandra and XMM-Newton observation , B. Stelzer and V. Burwitz, Astronomy and Astrophysics 402 (May 2003), pp. 719?728.
^ ADS 9731: A new sextuple system , A. A. Tokovinin, N. I. Shatskii, and A. K. Magnitskii, Astronomy Letters, 24, #6 (November 1998), pp. 795?801.
^ Nu Scorpii L?u tr? 2017-09-05 t?i Wayback Machine , entry in the Multiple Star Catalog L?u tr? 2021-02-14 t?i Wayback Machine .

Lien k?t ngoai [ s?a | s?a ma ngu?n ]

[1] "Star system" in Modern Dictionary of Astronomy and Space Technology . A.S. Bhatia, ed. New Delhi: Deep & Deep Publications, 2005. ISBN 81-7629-741-0

[2] Are Proxima and α Centauri Gravitationally Bound? , Jeremy G. Wertheimer, Gregory Laughlin, Astronomical Journal 132 , #5 (November 2006), pp. 1995–1997.

[3] Does triple star orbit directly affect orbit time , Jeremy Hien, Jon Shewarts, Astronomical News 132 , #6 (November 2011)

[4] 4 Centauri L?u tr? 2011-06-15 t?i Wayback Machine , entry in the Multiple Star Catalog L?u tr? 2021-02-14 t?i Wayback Machine .

[5] The Binary Stars , R. G. Aitken, New York: Semi-Centennial Publications of the University of California, 1918.

[6] Vol. 1, part 1, p. 422, Almagestum Novum L?u tr? 2011-08-10 t?i Wayback Machine , Giovanni Battista Riccioli, Bononiae: Ex typographia haeredis Victorij Benatij, 1651.

[mizar-7] A New View of Mizar L?u tr? 2008-03-07 t?i Wayback Machine , Leos Ondra, accessed on line ngay 26 thang 5 n?m 2007.

[8] Castor A and Castor B resolved in a simultaneous Chandra and XMM-Newton observation , B. Stelzer and V. Burwitz, Astronomy and Astrophysics 402 (May 2003), pp. 719?728.

[9] ADS 9731: A new sextuple system , A. A. Tokovinin, N. I. Shatskii, and A. K. Magnitskii, Astronomy Letters, 24, #6 (November 1998), pp. 795?801.

[10] Nu Scorpii L?u tr? 2017-09-05 t?i Wayback Machine , entry in the Multiple Star Catalog L?u tr? 2021-02-14 t?i Wayback Machine .

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