So I guess what I meant to convey by that is that the first shot I linked looks overexposed. The second shot I linked superimposed the booster over an unmoving

So I guess what I meant to convey by that is that the first shot I linked looks overexposed. The second shot I linked superimposed the booster over an unmoving star field. I gave it a fuller read and saw why this turned out to be the case (Lighten on 29 out of 30 layers in Photoshop to achieve the star trail effect). Since he has 30 frames to work with, he has enough data to create the same ultra-long-exposure effect without it looking overexposed. Probably just more Photoshop fiddling, really.