A sedimentation rate is common blood test that is used to detect and monitor inflammation in the body. The sedimentation rate is also called the erythrocyte sedimentation rate because it is a measure of the red blood cells (erythrocytes) sedimenting in a tube over a given period of time. Sedimentation rate is often abbreviated as sed rate or ESR. Although this test measures a general state of inflammation, it is not specific to what causes the inflammation. It is elevated in inflammatory diseases, including arthritis as well as in autoimmune diseases such as lupus.
Earth spins because of the way it was formed. Our Solar System formed about 4.6 billion years ago when a huge cloud of gas and dust started to collapse under its own gravity. As the cloud collapsed, it started to spin. Some of the material within this cloud gathered into swirling eddies and eventually formed into planets.
Articles >> How Fast Does the Earth Rotate? The Earth is the third planet from the sun, and is a rocky planet with a solid body. The Earth rotates around its axis (an imaginary line which goes from the North Pole to the South Pole) in a counter-clockwise direction. The angle of the axis on which the Earth rotates is tilted from the angle at which the Earth orbits the sun: imagine the Earth standing straight up as it orbits the sun - but rotating on a slight lean.