Universe Today
a month
Credit: NASA/GSFC/A.T. Sinclair Annular vs. Total Sunday's eclipse is the first of two solar eclipses for 2017, and the only annular eclipse for the year. We get an annular eclipse when the Moon is near apogee (which occurred eight days ago on February 18 th ) and the Earth is near perihelion (which occurred last month on January 4th). At this time, the apparent size of the Moon is too small to cover the Sun as seen from the Earth, resulting instead in a brilliant annulus or “ring of fire” in the sky. Likewise, we refer to the shadow trace of this ring across the Earth as an antumbra , instead of the familiar umbra of a total solar eclipse. Strange as it may seem, annular eclipses are slightly more common than total solar eclipses in our current epoch, and will become increasingly more so as the Moon slowly recedes from the Earth. The alignment needed for an annular eclipse.
The Huffington Post
3 months
What is a disc herniation? The intervertebral disc is an elastic soft cushion that is between the vertebrae of the spine (Figure 9). It connects the vertebrae together, gives stability to the spine, and allows the spine to move. The intervertebral disc has two parts; the annulus fibrosus (tough fibrous outer layer) and the nucleus pulposus (soft gel-like inner layer) (Figure 10). If the soft gel-like inner material leaks out or herniates through a tear in the fibrous outer layer, it becomes a disc herniation. A tear of the disc may allow the gel-like material in the center of the disc to protrude and leak out, causing a herniation of the disc, which presses into the nerve root as it exits the spine. This irritates the close by nerve root, causing sciatica. Sciatica is one of the most common symptoms of lumbar disc herniation. Treatment Treatment will initially include anti-inflammatory medication, muscle relaxation and physical therapy.
Sky News
3 months
Many of the herb were treated for burns, bruises, and shock. -- hurt. Locals were asked to keep the roads clear so the annulus is to quickly get the annulus is to batch injured to hospital. It was very loud, there were several explosions and we saw the smoke.
Universe Today
7 months