The Dog Stars: The hope-filled story of a world changed by global catastrophe

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Sirius is mentioned in Surah, An-Najm ("The Star"), of the Qur'an, where it is given the name الشِّعْرَى (transliteration: aš-ši'rā or ash-shira; the leader). [129] The verse is: " وأنَّهُ هُوَ رَبُّ الشِّعْرَى", "That He is the Lord of Sirius (the Mighty Star)." (An-Najm:49) [130] Ibn Kathir said in his commentary "that it is the bright star, named Mirzam Al-Jawza' (Sirius), which a group of Arabs used to worship". [131] The alternate name Aschere, used by Johann Bayer, is derived from this. [19] Sirius midnight culmination at New Year 2022 local solar time [132]

Koposov, Sergey E.; Belokurov, V.; Torrealba, G. (2017). "Gaia1 and 2. A pair of new galactic star clusters". Monthly Notices of the Royal Astronomical Society. 470 (3): 2702–2709. arXiv: 1702.01122. Bibcode: 2017MNRAS.470.2702K. doi: 10.1093/mnras/stx1182. S2CID 119095351. Darling, David. "Winter Triangle". The Internet Encyclopedia of Science . Retrieved 20 October 2007. In ancient Egypt, Sirius was known as Sopdet (Greek: Σῶθις, or Sothis), the goddess who was part of the triad with her husband Osiris and son Horus. The hieroglyph for Sothis has a star and a triangle. Doostkhah, Jalil (1996). Avesta. Kohantarin Sorōdhāye Irāniān. Tehran: Morvarid Publications. ISBN 964-6026-17-6. It is, however, significantly less luminous than Canopus, Rigel, and many other bright stars that lie at greater distances.

Ancient Polynesians used Sirius for navigation, and saw it as part of the Great Bird constellation called Manu. The bright star Canopus in Carina marked the southern wingtip and Procyon in Canis Minor the northern one. The constellation divided the sky into two hemispheres, and the stars were used as latitude markers. The declination of Sirius matches the latitude of Fiji at 17°S, which means that the star passes directly over the islands every night. Along with the bright stars Procyon in Canis Minor and Betelgeuse in Orion constellation, Sirius forms the Winter Triangle, a familiar asterism in the night sky, and easy to spot in winter evenings in the northern hemisphere. Several occult researchers believe that the Great Pyramid of Giza was constructed in perfect alignment with stars, particularly with Sirius and the three stars of the Orion’s Belt. Recent findings related to the pyramid’s mysterious air shafts have strengthened the theory of Sirius’ importance to Egyptians. Flammarion, Camille (August 1877). "The Companion of Sirius". The Astronomical Register. 15 (176): 186–189. Bibcode: 1877AReg...15..186F.

a b c d Kervella, P.; Thevenin, F.; Morel, P.; Borde, P.; Di Folco, E. (2003). "The interferometric diameter and internal structure of Sirius A". Astronomy and Astrophysics. 407 (2): 681–688. arXiv: astro-ph/0306604. Bibcode: 2003A&A...408..681K. doi: 10.1051/0004-6361:20030994. S2CID 16678626. The heliacal rising is the first rising of a star (or a planet, a constellation, or the Moon) over the eastern horizon just before sunrise after a period when the star had not been visible. Every day after the heliacal rising, the star rises a bit earlier and is visible for a little longer before dawn. Star system Ceragioli, R. C. (1995). "The Debate Concerning 'Red' Sirius". Journal for the History of Astronomy. 26 (3): 187–226. Bibcode: 1995JHA....26..187C. doi: 10.1177/002182869502600301. S2CID 117111146.a b c McCook, G. P.; Sion, E. M. (2014). "Entry for WD 0642-166". VizieR Online Data Catalog. CDS. Bibcode: 2016yCat....102035M. The Dog Stars is a post-apocalyptic fiction novel by Peter Heller. Set in Colorado, a man lives a lonesome existence in an airplane hangar with his dog and a door gunman he has befriended. When a mysterious transmission comes through on the radio while he’s flying his old Cessna, it sparks a hunt for the provenance of the sound. [1] [2] [3] [4] [5] Reception [ edit ] The primary component, Sirius A, is roughly twice as massive as the Sun and 25 times more luminous. It has an estimated surface temperature of 9,940 K. Sirius has over 50other designations and names attached to it. [71] In Geoffrey Chaucer's essay Treatise on the Astrolabe, it bears the name Alhabor and is depicted by a hound's head. This name is widely used on medieval astrolabes from Western Europe. [20] In Sanskrit it is known as Mrgavyadha "deer hunter", or Lubdhaka "hunter". As Mrgavyadha, the star represents Rudra ( Shiva). [113] [114] The star is referred to as Makarajyoti in Malayalam and has religious significance to the pilgrim center Sabarimala. [115] In Scandinavia, the star has been known as Lokabrenna ("burning done by Loki", or "Loki's torch"). [116] In the astrology of the Middle Ages, Sirius was a Behenian fixed star, [117] associated with beryl and juniper. Its astrological symbol was listed by Heinrich Cornelius Agrippa. [118] Cultural significance [ edit ]

Sirius has more than 50 names and designations attached to it. In medieval astrolabes from western Europe it is called Alhabor. This is the name Geoffrey Chaucer used in his Treatise on the Astrolabe, with the star depicted as a dog’s head. The orbital motion of the Sirius binary system brings the two stars to a minimum angular separation of 3 arcseconds and a maximum of 11arcseconds. At the closest approach, it is an observational challenge to distinguish the white dwarf from its more luminous companion, requiring a telescope with at least 300mm (12in) aperture and excellent seeing conditions. After a periastron occurred in 1994, [c]The two white stars orbit each other with a period of 50.1 years and an average separation roughly 20 times the distance from the Earth to the Sun. More recent (and accurate) astrometric observations by the Hubble Space Telescope ruled out the existence of such a SiriusC entirely. The 1995 study predicted an astrometric movement of roughly 90 mas (0.09arcsecond), but Hubble was unable to detect any location anomaly to an accuracy of 5mas (0.005arcsec). This ruled out any objects orbiting SiriusA with more than 0.033solar mass (35Jupiter masses) orbiting in 0.5years, and 0.014 (15 Jupiter masses) in 2years. The study was also able to rule out any companions to SiriusB with more than 0.024solar mass (25Jupiter masses) orbiting in 0.5year, and 0.0095 (10Jupiter masses) orbiting in 1.8years. Effectively, there are almost certainly no additional bodies in the Sirius system larger than a small brown dwarf or large exoplanet. [100] [12] Star cluster membership [ edit ]