How to Tie a Bow Tie. Whether you're wearing a tuxedo at a wedding or singing in a barbershop quartet, you need to know how to tie a bow tie. It's not something most of us do very often, but luckily, if you can tie your shoes, you can tie.
Andromeda Galaxy A massive spiral million light-years away, over twice the diameter of our own Milky Way, it's the largest nearby galaxy. Andromeda's population of bright young blue stars lie along its sweeping spiral arms. by Spitzer Space Telescope