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A multiple star system consists of two or more stars that appear from Earth to be close to one another in the sky. [dubious – discuss] This may result from the stars actually being physically close and gravitationally bound to each other, in which case it is a physical multiple star, or this closeness may be merely apparent, in which case it is an optical multiple star [a] Physical multiple ...
Botanical illustration of a pōhutukawa sprig by Ellen Cheeseman. Pōhutukawa (Metrosideros excelsa), [2] also known as the New Zealand Christmas tree, [3] [4] or iron tree, [5] is a coastal evergreen tree in the myrtle family, Myrtaceae, that produces a brilliant display of red (or occasionally orange, yellow [6] or white [7]) flowers, each consisting of a mass of stamens.
Five of the planets orbit very close to the star, [10] with the farthest of them located twice as close to HD 40307 than is the planet Mercury is to the Sun. [23] [note 2] The outermost planet orbits at a distance similar to the distance of Venus to the Sun and is situated well in the system's liquid water habitable zone. [10]
Hiwa-i-te-rangi, also known just as Hiwa, is the youngest of Matariki's children and was considered the "wishing star": Māori would rest their hopes and desires on Hiwa, similar to "wishing upon a star", and if it appeared to shine bright and clear on the first viewing of Matariki those individual and collective wishes were likely to be answered.
HD 132563 is a triple star system in the constellation Boötes.The two resolvable components of this system are designated HD 132563 AC and HD 132563 B. The primary star, HD 132563 AC, is actually a spectroscopic binary with a period of more than 15 years and an orbital eccentricity of greater than 0.65.
The orbit of HD 188753 BC around A. The primary star, HD 188753 A, is similar to the Sun [9] with a mass only 6% larger and a stellar classification of G8V. [3] Orbiting this primary at a distance of 12.3 AU [10] is a pair of smaller stars that orbit each other with a period of 156.0 ± 0.1 days, a semi-major axis of 0.67 AU, and eccentricity of 0.1 ± 0.03.
PSR B1257+12, previously designated PSR 1257+12, alternatively designated PSR J1300+1240, [6] is a millisecond pulsar, 2,300 light-years (710 parsecs) from the Sun, in the constellation Virgo, rotating at about 161 times per second (faster than the blade of a blender). [1]
Kepler-296 is a binary star system [3] in the constellation Draco. The primary star appears to be a late K-type main-sequence star , while the secondary is a red dwarf . [ 2 ]