3 ms·
No, they definitely exists, for example: https://en.wikipedia.org/wiki/Cygnus_X-1 https://en.wikipedia.org/wiki/Cygnus_X-1
by kowdermeister 9y ago
No, they definitely exists, for example:
https://en.wikipedia.org/wiki/Cygnus_X-1 https://en.wikipedia.org/wiki/Cygnus_X-1