Bach khoa toan th? m? Wikipedia
Bai vi?t v? cac ngoi sao trong khong gian v? tr?. đ?i v?i h? th?ng hanh tinh quay quanh m?t ngoi sao, xem
H? hanh tinh
.
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.
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
.
- ^
"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
.