Mercury circles the Sun in only 88 days, compared to 365 days for Earth, at at an average speed of 105,947 miles (170,505 kilometers) per hour. This is faster than any other planet in the Solar System. 1  Javascript must be enabled to use Cool Cosmos. 2  Learn how.
The traditional names of the rowan are those applied to the species Sorbus aucuparia, Sorbus torminalis (wild service-tree), and Sorbus domestica (true service-tree). The Latin name sorbus was borrowed into Old English as syrfe. The name service-tree for Sorbus domestica is derived from that name by folk etymology.
Salix alba (white willow) is a species of willow native to Europe and western and central Asia.The name derives from the white tone to the undersides of the leaves. Salix alba 'Sericea' (silver willow) is a cultivar where the white hairs on the leaves are particularly dense, giving it more strongly silvery-white foliage. 2  This cultivar has gained the Royal Horticultural Society 's Award of Garden Merit.