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Crux (/ k r ĘŚ k s /) is a constellation of the southern sky that is centred on four bright stars in a cross-shaped asterism commonly known as the Southern Cross. It lies on the southern end of the Milky Way 's visible band.
Acrux is the brightest star in the southern constellation of Crux. It has the Bayer designation α Crucis , which is Latinised to Alpha Crucis and abbreviated Alpha Cru or α Cru . With a combined visual magnitude of +0.76, it is the 13th-brightest star in the night sky .
Gacrux is the third-brightest star in the southern constellation of Crux, the Southern Cross. It has the Bayer designation Gamma Crucis, which is Latinised from γ Crucis and abbreviated Gamma Cru or γ Cru. With an apparent visual magnitude of +1.63, [8] it is the 26th brightest star in the night sky.
The Southern Cross constellation functions as an approximate southern pole constellation, by pointing to where a southern pole star would be. At the equator, it is possible to see both Polaris and the Southern Cross. [16] [17] The celestial south pole is moving toward the Southern Cross, which has pointed to the south pole for the last 2000 ...
Mimosa is the second-brightest object in the southern constellation of Crux (after Acrux), and the 20th-brightest star in the night sky. It has the Bayer designation β Crucis, which is Latinised to Beta Crucis and abbreviated Beta Cru or β Cru. Mimosa forms part of the prominent asterism called the Southern Cross.
Chart of the southern constellations from declination –40° to the south celestial pole by the Jesuit missionary François Noël published in Acta Eruditorum, 1711.. From the South Pole, in good visibility conditions, the Southern Sky features over 2,000 fixed stars that are easily visible to the naked eye, while about 20,000 to 40,000 with the aided eye.
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The Jewel Box cluster is regarded as one of the finest objects in the southern sky. [12] It is visible to the naked eye as a hazy object of the fourth magnitude. [13] It can be easily located using the star Beta Crucis as a guide, and appears as a fourth magnitude object. [14] It is impressive when viewed with binoculars or a small or large ...