Showing posts from January, 2019

Have We Found the True Cause of Alzheimer's?

Alzheimer’s has been a mysterious disease ever since it was discovered. Considered to be a condition that fits into the dementia category, Alzheimer’s disease is characterized by physical changes in the brain that deteriorate brain function, cognitive ability, and memory in a certain pattern. People who are at least 65 years old are most often affected, however, there are also early-onset cases. The progression of Alzheimer’s happens over decades and since the brain is such a complicated organ, it has been difficult for scientists to study. The brain of the patient that had the first named case of Alzheimer’s disease was found to have amyloid (protein) plaques and tao tangles (tangles of fibers) within it. These abnormalities have long been considered by medical professionals to be one of the main causes of the disease, however recent studies suggest that the true cause could be another condition that happens initially, and this abnormal tissue growth may be a secondary symptom.Stock…

How the Stars Got Their Colors

After seeing hundreds of dazzling galaxies and nebulae in print, one might have a preconceived notion of what it’s like to look through a telescope. The reality, however, is somewhat different. Celestial objects such as galaxies, star clusters, and planetary systems are some of the most beautiful treasures in outer space. Unfortunately, they’re so far away that they mostly appear faint to the naked eye, even when viewed through a telescope. The problem is that, unlike a camera, our eyes cannot adjust their exposure time in order to soak up more light from these distant objects. For astrophotographers to get the vibrant colors of a nebula or galaxy, they need to rely on a number of techniques, including long exposures, color compositing and sometimes editing in post-production. Eagle Nebula, Messier 16. SS2596669. The famous Eagle Nebula pictured here is actually three monochromatic images mapped to different color wavelengths combined to create one image. Some might say that this mak…