Zeta Ophiuchi
Appearance
![](http://upload.wikimedia.org/wikipedia/commons/thumb/0/06/Sig12-014.png/200px-Sig12-014.png)
Zeta Ophiuchi is the closest O-type star to the Sun at nearly 400 light years away.[1] It is over 8 times wider than the Sun[2] and appears to be travelling fast through space. This could be because it was blasted by a supernova explosion. The fast motion of Zeta Ophiuchi created a bow shock, or shaped gas, around it as it travels through space.