Virgin Galactic is gambling its future on Delta -- but so far, the bet is working out.Shares of space-tourism pioneer Virgin Galactic (SPCE 12.34%) took off like a rocket this morning after the company announced it has opened a "systems integration facility" to begin testing its new Delta-class spaceplane -- and that testing of "initial subsystems" has already begun. Even better, Virgin Galactic confirmed that it remains on track to begin flying Delta commercially in 2026.As of 10:25 a.m. ET, Virgin Galacti ...