Costermonger Costermonger Costermonger, coster, or costard is a street seller of fruit and vegetables, in London and other British towns. The term is derived from the words "costard" (a now extinct medieval variety of large, ribbed apple) and "monger" (seller), and later came to be used to describe hawkers in general. Some historians have pointed out that a hierarchy existed within the costermonger class and that while costermongers sold from a handcart or animal-drawn cart, mere hawkers carried their wares in a basket. Costermongers met a need for rapid food distribution from the wholesale markets (e.g., in London; Smithfield for meat,
A-type main-sequence star also occasionally sees Delta Leonis (A4 V) listed as a standard. There are no published A6 V and A8 V standard stars. A-type stars are young (typically few hundred million years old) and many emit infrared (IR) radiation beyond what would be expected from the star alone. This IR excess is attributable to dust emission from a debris disk where planets form. Surveys indicate massive planets commonly form around A-type stars although these planets are difficult to detect using the Doppler spectroscopy method. This is because A-type stars typically rotate very quickly, which makes it difficult to measure the small