It's not a trick. There are really galaxies very far away. Who said it was a trick?
Discussion
If Jehovah created "the heavens and the Earth" just 6,000 years ago, and light emitted from objects further away than 6,000 light years is reaching Earth now, either the story in the Jew-book is wrong, or Jehovah created the light in transit. Since we know for sure that the ancient Jewish scribblers never lied, it must be the latter.