Meet comet 21P/Giacobini-Zinner, which just made its closest approach to Earth in 72 years. As our planet’s orbital path passes through its tail of icy debris, it sets off the Draconic meteor shower, peaking around October 8 every year. Astronomers study comets and their paths because they are relics of our solar system’s early days. …
Continue reading “Space Photos of the Week: Shooting Stars and Dwarf Galaxies”