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Mira

(Encyclopedia)Mira mīˈrə [key], [Lat.,=marvelous], variable star in the constellation Cetus; Bayer designation Omicron Ceti; 1992 position R.A. 2h19.0m, Dec. −3°05′. The most famous long-period variable, Mi...

McGrory, Mary

(Encyclopedia)McGrory, Mary, 1918–2004, American journalist, b. Boston, grad. Emmanuel College. McGrory wrote with clarity, lyricism, and wit on the events and personalities of the five decades spanned by her gro...

Virgo

(Encyclopedia)Virgo vûrˈgō [key] [Lat.,=the virgin], constellation lying on the ecliptic (the sun's apparent path through the heavens) between Libra and Leo, and SW of Boötes; it is one of the constellations of...

Canis Major

(Encyclopedia)Canis Major kāˈnĭs [key] [Lat.,=greater dog], constellation lying near the celestial equator, SE of Orion. Known as the Large Dog (Canis Minor is the Small Dog), it was associated with the figure o...

sapphire

(Encyclopedia)sapphire, precious stone. A transparent blue corundum, it is classified among the most valuable of gems. Sapphires are found chiefly in Madagascar, Sri Lanka, and Myanmar and also in Thailand, Tanzani...

Melrose, city, United States

(Encyclopedia)Melrose, city (1990 pop. 28,150), Middlesex co., E Mass., a suburb of Boston; settled c.1629, set off from Malden and inc. 1850. It is chiefly residential. The opera star Geraldine Farrar was born in ...

twilight

(Encyclopedia)twilight, period between sunset and total darkness or between total darkness and sunrise. Total darkness does not occur immediately when the sun sinks below the horizon because light from the sun that...

southern tick-associated rash illness

(Encyclopedia)southern tick-associated rash illness (STARI) or Masters disease, illness characterized by a Lyme disease–like rash that is associated with bite from the Lone Star tick (Amblyomma americanum) rather...

Bessel, Friedrich Wilhelm

(Encyclopedia)Bessel, Friedrich Wilhelm frēdˈrĭkh vĭlˈhĕlm bĕsˈəl [key], 1784–1846, German astronomer and mathematician. He became (1810) director of the new observatory at Königsberg and professor of a...

Cepheid variables

(Encyclopedia)Cepheid variables sēˈfēĭd [key], class of variable stars that brighten and dim in an extremely regular fashion. The periods of the fluctuations (the time to complete one cycle from bright to dim a...