Ever since early humans gazed in wonder at the majesty of the night sky, astronomy has been a particularly visual science. Modern astronomers deal in vast quantities of data, measuring the cosmos with visible light and invisible neutrinos, x-rays and cosmic rays, radio waves and gravity waves. Yet its the glorious images of astronomy — the planets, nebulae and galaxies — that capture our minds and fuels our imaginations. In this episode we discuss what makes astrophotography so important, and Emily lists her Top 4 mind-blowing cosmic images.