Create a science-fiction book cover

Create a science-fiction book cover. Display the title "THE LAST SIGNAL" at the top center. Show a lone radio tower on a frozen mountain peak beneath a sky filled with aurora lights and distant stars. Typography: bold condensed sans-serif, white lettering with a subtle blue glow, clear and readable. Style: cinematic science-fiction cover art, atmospheric, dramatic, premium. Use a vertical 2:3 book-cover composition. Do not add watermark, extra text, logos, or people.