Space Viking by H. Beam Piper

The outside viewscreen, which had been vacantly gray for over three thousand hours, was now a vertiginous swirl of color, the indescribable color of a collapsing hyperspatial field. No two observers ever saw it alike, and no imagination could vision the actuality. Trask found that he was holding his breath. So, he noticed, was Otto Harkaman, beside him. It was something, evidently, that nobody got used to. Even Guatt Kirbey, the astrogator, was sitting with his pipe clenched in his mouth, staring at the screen.

Then, in an instant, the stars, which had literally not been there before, filled the screen with a blaze of splendor against the black velvet backdrop of normal space. Dead in the center, brighter than all the rest, Ertado's Star, the sun of Tanith, burned yellowly. The light from it was ten hours old.