The shivers, the shakes, the chills—we've all experienced a fever at one time or another. When we take our temperatures and the thermometer reads anything above 99 degrees, many of us immediately believe we are afflicted with some kind of infectious microbe. But, in fact, having a fever doesn't always signal infection. Yes, contagions like strep throat or the flu, are the most common reason for an elevated temperature, but it's surely not the only one. More uncommon ailments like brain injury, reactions to legal and illegal drugs, and even cancer can raise your body temperature above its natural level. But don't freak out, yet. Knowing what the causes are and how they can occur can help you make the most informed decision about your elevated body temperature.
Our galaxy, the Milky Way, is a barred-spiral, making its way through space like a twirling baton with streamers on each end, carefree. It's a shape that we all know and love. Nothing wrong with that, barred spirals are great. But other galactic shapes are far more mysterious and intriguing to astronomers.