Is C_2 a real molecule?

A homonuclear diatomic molecule ${C}_{2}$ can be observed........
It is not something you could put in a bottle, but the homonuclear diatomic, ${C}_{2}$, has been observed spectroscopically. I think this molecule has a bond order of $2$, i.e. $: C = C :$, so it is relatively stable. It would need quite elevated temperatures to enable its observation.