he Milky Way has a diameter of approximately 100,000 light years, meaning that it would take light that long to travel from one end to the next. Our Solar System – comprising the Sun, its orbiting planets, comets, asteroids and all kinds of other space bodies – doesn’t have a clear boundary. But if you use the orbit of its furthest known objects – the cloud of comets called the Oort Cloud, much farther from the Sun than
Studying Ebola
This shows the filamentous particles of the Ebola virus under a microscope. The Ebola filaments are being studied on a bed of epithelial Vero E6 cells derived from the kidney of a green monkey (blue). These are used because the cells don’t produce a
