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Phenomena, 2007: May

For terms in boldface, see Astronomical Terms. Day Phenomenon Hour 2 FULL MOON 1000 3…

Phenomena, 2006: July

For terms in boldface, see Astronomical Terms.DayPhenomenonHour1The Moon is at apogee.20001Pallas, the second-largest asteroid, is at opposition.20002Venus is 4° north of Aldebaran, the…

Phenomena, 2006: December

For terms in boldface, see Astronomical Terms.DayPhenomenonHour2The Moon is at perigee.00005FULL MOON00006Saturn appears to be motionless in the sky as it goes from direct motion to…

February 2008 Phenomena

For terms in boldface, see Astronomical Terms. Day Phenomenon Hour 1 Antares, the brightest star in the…

Local Group

(Encyclopedia) Local Group, in astronomy, loose cluster of at least 40 nearby galaxies, including our own Milky Way galaxy, the Andromeda Galaxy, and the Magellanic Clouds. The Local Group is spread…

Algol, in astronomy

(Encyclopedia) AlgolAlgolălˈgŏl [key], famous variable star in the constellation Perseus; Bayer designation β Persei; 1992 position R.A. 3h07.7m, Dec. +40°55′. Algol's variation in apparent magnitude…

Hyades, in astronomy

(Encyclopedia) HyadesHyadeshīˈədēz [key], in astronomy, open star cluster in the constellation Taurus, located immediately to the right of the bright star Aldebaran. The cluster is about 130 light-…

Sirius

(Encyclopedia) SiriusSiriussĭrˈēəs [key], or Dog Star, brightest star in the sky. It is located in the constellation Canis Major (1992 position R.A. 6h44.8m, Dec. −16°42′); its Bayer designation is…

Crab Nebula

(Encyclopedia) Crab Nebula, diffuse gaseous nebula in the constellation Taurus; cataloged as NGC 1952 and M1, the first object recorded in Charles Messier's catalog of nonstellar objects (see Messier…