. What details does the writer give to make his travel through space seem believable? What may cause the twinkling succession of light and dark?

                                                           .      What details does the writer give to make his travel through space seem believable?  What may cause the twinkling succession of light and dark?  …the sunbelt to sway “up and down, from the solstice to solstice”?...the buildings to appear and disappear “like vapor”?