The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma (state of matter) interwoven with magnetic fields. It has a diameter of about 1,392,000 km, about 109 times that of Earth, and its mass (about 330,000 times that of Earth) accounts for about 99.86% of the total mass of the Solar System. Scientists calculate our Sun and solar system formed at the same time - a whopping 4.56 billion years ago.
Definition of crural. : of or relating to the thigh or leg; specifically : femoral crural artery.
Dura: The outermost, toughest, and most fibrous of the three membranes (meninges) covering the brain and the spinal cord. Dura is short for dura mater (from the Latin for hard mother). Also called the pachymeninx (singular) or pachymeniges (plural). Epidural means outside the dura.An accumulation of blood outside the dura is an epidural hematoma. Subdural means under the dura. A bleed under the dura may result in a subdural hematoma.ura is short for dura mater (from the Latin for hard mother). Also called the pachymeninx (singular) or pachymeniges (plural). Epidural means outside the dura. An accumulation of blood outside the dura is an epidural hematoma. Subdural means under the dura.