Each is a galaxy, fully like ours or Andromeda, which looks so small and faint because its light has taken 10 billion light-years to get to us.
每个都是一个星系，类似我们的银河系或仙女星系。 它们看似微小和暗淡是因为 它们发出的光经历了上百亿光年才到达这里。