(Encyclopedia) thistle, popular name for many spiny and usually weedy plants, but especially applied to members of the family Asteraceae (aster family) that have spiny leaves and often showy heads of…
Seasons for the Northern Hemisphere, 2005Spring Equinox: Mar. 20, 7:34 A.M. EST (12:33 UT1), Sun enters sign of Aries; spring begins.Summer Solstice: June 21, 2:46 A.M. EDT (06:46 UT1), Sun enters…
(Encyclopedia) lettuce, annual garden plant (Lactuca sativa and varieties) of the family Asteraceae (aster family), probably native to the East Indies or Asia Minor, possibly as a derivative of the…
(Encyclopedia) sunflower, any plant of the genus Helianthus of the family Asteraceae (aster family), annual or perennial herbs native to the New World and common throughout the United States. In…
(Encyclopedia) sagebrush, name for several species of Artemisia, deciduous shrubs of the family Asteraceae (aster family), particularly abundant in arid regions of W North America. The common…
(Encyclopedia) wormwood, Mediterranean perennial herb or shrubby plant (Artemisia absinthium) of the family Asteraceae (aster family), often cultivated in gardens and found as an escape in North…
The science and significance of the autumnal equinox The autumnal equinox is a sure sign of fall. Related Links Seasons of the Northern Hemisphere, 2016 Seasons for the Northern…
As Earth revolves around the Sun, a different part of the sky becomes visible. The dates below show when the constellations can be seen on the horizon in North America.…
HAYES, Rutherford Birchard, a Representative from Ohio and 19th President of the United States; born in Delaware, Delaware County, Ohio, October 4, 1822; attended the common schools, the…
