- Sulfur (also spelled sulphur in British English) is a chemical element; it has symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with the chemical formula S8. Elemental sulfur is a bright yellow, crystalline solid at room temperature.
- Megrez (stars.astro.illinois.edu)
MEGREZ (Delta Ursae Majoris). The faintest star of the Big Dipper, Megrez is in the Dipper’s middle, linking the handle to the bowl, and in the bigger picture linking Ursa Major’s tail to the Bear’s hindquarters. The name appropriately refers not to the Dipper, but to the Bear, and straightforwardly comes from a long Arabic phrase that means the root of the Great Bear’s tail.