Eta Centauri (η Cen / η Centauri) is a star in the constellationCentaurus. The Pleiades star cluster A star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. ... Orion is a remarkable constellation, visible from most places on the globe (but not always the whole year long). ... Centaurus (Latin for centaur) was one of the 48 constellations listed by Ptolemy, and counts also among the 88 modern constellations. ...
It has apparent magnitude 2.31 and is of spectral type B1.5Vne. The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ...
The nearest star of all, Alpha Centauri 4.4 light-years away, is quite sun-like but has a problem: It is a double star, with a smaller companion sun orbiting it uncomfortably closely.
Eta Cassiopeiae, on the other hand, has 65 percent of the Sun's proportion of heavy elements, probably enough to give it a proper solar system.
Eta Cassiopeiae does vary in brightness by a few percent, but this should not be a killing problem.
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