Arcturus
Definition
The proper name of the brightest star in the constellation Boötes and the fourth-brightest star in the entire night sky, being an orange giant located approximately 36.7 light-years from Earth. In mythology, the name originates from ancient Greek and means 'guardian of the bear', due to its structural proximity to the Ursa Major constellation.
Bilingual Equivalents
- Arcturus
- Alpha Boötis
Grammatical & Source Details
| Inflection Type | Proper masculine noun, singular structural template without regular plural variations. |
| Formation | Adaptation of the ancient Greek celestial name, functionally stabilized across global modern astronomical standards. |
| Spelling / Pronunciation | [ark.ˈtu.rus] |
| Source | IAU Working Group on Star Names and Astrophysical Catalogs |
Contextual Usage Examples
RO: Urmărind arcul format de oile din Ursa Mare, poți găsi cu ușurință steaua strălucitoare Arcturus pe cerul de primăvară.
EN: By following the arc formed by the handle of the Big Dipper, you can easily find the bright star Arcturus in the spring sky.
RO: Astrofizicienii au determinat că Arcturus a intrat deja în faza de gigantă, consumându-și rezervele de hidrogen din nucleul structural.
EN: Astrophysicists have determined that Arcturus has already entered the giant phase, consuming its hydrogen reserves within its structural core.
RO: În antichitate, ridicarea heliachală a stelei Arcturus marca începutul perioadelor de recoltare pentru agricultorii eleni.
EN: In antiquity, the heliacal rising of the star Arcturus marked the beginning of harvest periods for Hellenic farmers.
Idioms & Phrases
Mișcarea proprie a lui Arcturus / Proper motion of Arcturus
RO: Deplasarea angulară rapidă a acestei stele pe bolta cerească, una dintre cele mai mari observate la stelele strălucitoare din vecinătate.
EN: The rapid angular displacement of this star across the celestial vault, one of the largest observed among nearby bright stars.
Fluxul stelar Arcturus / Arcturus stream
RO: Grup structural de stele bătrâne care se deplasează împreună cu Arcturus, considerat a fi restul unei galaxii pitice asimilate de Calea Lactee.
EN: A structural group of old stars moving together with Arcturus, considered to be the remnant of a dwarf galaxy assimilated by the Milky Way.
Poziția Arcturus / Arcturus position
RO: Coordonatele ecuatoriale precise utilizate de navigatori și sistemele automate de ghidare ale telescoapelor pentru calibrare.
EN: The precise equatorial coordinates used by navigators and automated telescope guiding systems for calibration.
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