The Final Frontier?

As you can see the newly aquired 2X converter fixed to the 400mm Sigma is making all the difference to my astrophotography!!! LOL......
So if its not one of the planets or a spacecraft what do you recon it is then?
Off to the camera clubs first AGM, determined not to come home with a "title"! Will catch up with your journals when I get back,so take care out there one and all ;¬}