The Wondrous Universe
The stars began to shine unusually bright and clear above the observatory in the Arizona desert. Gradually the broad luminous band of the Milky Way appeared distinctly. The astronomers had ended their day’s sleep, and now went to work carrying liquid nitrogen to cool their instruments, checking the CCD pixels in the twilight, and then pointing their telescopes toward faraway galaxies and star clusters. As a short-term visitor, I had the opportunity to look over their shoulders at the images of distant galaxies which were transmitted from the telescope to a computer screen.