Kijken naar de Big Bang

NASA's Hubble Space Telescope has uncovered the oldest burned-out stars, white dwarfs, estimated to be between 12 and 13 billion years old, inside this star cluster located 7,000 light-years away, as seen in this handout photo, date not known. Harvey B. Richer, an astronomer at the University of British Columbia, said Wednesday, April 24, it is estimated that star formation did not begin until about a billion years after the Big Bang. He said this means his best estimate for age of the universe is "about 13 billion years." Three years ago, astronomers using another method estimated the age at 13 to 14 billion years. That was based on precise measurements of the rate at which galaxies are moving apart. (AP Photo/NASA) ASSOCIATED PRESS