Virgo Supercluster, 29
virtual particles, 74, 111
volcanic eruptions, 180
Voyager, 39–40, 180–81
water, 117, 160, 181–82, 189, 201–2
water vapor, 160
wavelength, 154, 156n
weak nuclear forces, 20, 92
weather, 42
Wheeler, John Archibald, 101
Wilson, Robert, 43–56, 156
World Trade Center, 179
World War II, 52, 132
X-rays, 125, 151, 153, 154–55, 164
Yucatan Peninsula, Mexico, 31
Zwicky, Fritz, 76–79