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Common names for the genus include star-grass, [4] star lily, yellow stars, African potato, [2] and stars. [5] The genus is the largest of the Hypoxidaceae [ 6 ] [ 7 ] and has its centre of variation in South Africa, [ 6 ] [ 8 ] [ 9 ] where it occurs in open undisturbed grasslands. [ 8 ]
Sketch of Hertzsprung–Russell diagram of a globular cluster, showing blue stragglers. A blue straggler is a type of star that is more luminous and bluer than expected. . Typically identified in a stellar cluster, they have a higher effective temperature than the main sequence turnoff point for the cluster, where ordinary stars begin to evolve towards the red gi
[2] These species are sometimes referred to as living rocks , though the term is also used for other genera, particularly Lithops ( Aizoaceae ). The generic name is derived from the Greek words άστρον ( astron ), meaning "star," and φυτόν ( phyton ), meaning "plant."
Below there are lists the nearest stars separated by spectral type. The scope of the list is still restricted to the main sequence spectral types: M , K , F , G , A , B and O . It may be later expanded to other types, such as S , D or C .
A field guide is a book designed to help the reader identify wildlife (flora or fauna or funga) or other objects of natural occurrence (e.g. rocks and minerals). It is generally designed to be brought into the " field " or local area where such objects exist to help distinguish between similar objects. [ 1 ]
K0 III [2] 9.06 ± 0.03 [3] 1.91 ± 0.09 [3] 1.14 [4] 17th brightest star in the night sky. Arcturus: 36.7 ± 0.2 [1] K1.5 III Fe−0.5 [5] 25.4 ± 0.2 [6] 1.08 ± 0.06 [6]-0.05 [4] Fourth-brightest star in the night sky, and the nearest red giant to Earth. Deneb Algedi Delta Capricorni 38.70 ± 0.09 [1] A7m III [7] 1.91 [8] 2 [8] 2.91 [7] The ...
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Stars too massive to develop a degenerate helium core on the red-giant branch will ignite helium before the tip of the red-giant branch and perform a blue loop. For stars only a little more massive than the sun, around 2 M ☉, the blue loop is very short and at a luminosity similar to the red clump giants. These stars are an order of magnitude ...
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