Okay, that was more than three, but you get the point. A supernova is more significant than a nova, but less so than a hypernova. Supernovae are very bright and generate bursts of radiation that can briefly outshine a whole galaxy before declining in brightness over many weeks or months.n this period a supernova can emit as much energy as the Sun might over its entire lifetime. How Supernovae are Studied. By using optical telescopes, astronomers can approximate the amount of light generated by a supernova.
Cramps or spasms in the muscles often have no clear cause. Possible causes of hand or foot spasms include: 1  Abnormal levels of electrolytes or minerals in the body. 2  Brain disorders, such as Parkinson disease, multiple sclerosis, dystonia, and Huntington disease.  Chronic kidney disease and dialysis.
Causes of Muscle Spasms. Muscle spasms in the back can often be caused by a twisting or strain on one of the back muscles, which in turn causes involuntary muscle contractions. Although this often occurs when tense, tight back muscles are present, it can happen in any circumstance.s a result of the contraction people often complain of having symptoms of either a locked back, or a knot in their back. Among the most common causes of muscle spasms in the back... 1  a sneeze or cough. 2  lifting heavy objects. 3  incorrect sitting posture. 4  muscle overuse, or injury. 5  dehydration.