The brighter primary star has a temperature 22,400 Kelvin, a true luminosity of 12,100 Suns (after taking ultraviolet radiation into account), a radius 7 solar, (25 percent the separation between the two stars) and a mass 10.5 times solar, which may be enough to send it someday into a supernova explosion.
A grebe (/ËÉ¡riËb/) is a member of the order Podicipediformes and the only type of bird associated with this order. Grebes are a widely distributed order of freshwater diving birds, some of which visit the sea when migrating and in winter. This order contains only a single family, the Podicipedidae, containing 22 species in 6 extant genera.
Great crested grebes are the largest grebes in Europe. The plumage on the back and sides is mottled brown. The back of the neck is dark brown and the front of the neck and underside are white. They have long necks and reddish-orange plumes with black tips on their heads.eographic Range. Great crested grebes are residents of Western Europe, Britain, and Ireland, parts of southern and eastern Africa, Australia, and New Zealand. Breeding populations are found from Eastern Europe through Southern Russia and to Mongolia.