You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Apollo_program

Context:
The crew of Apollo 8 sent the first live televised pictures of the Earth and the Moon back to Earth, and read from the creation story in the Book of Genesis, on Christmas Eve, 1968. An estimated one-quarter of the population of the world saw—either live or delayed—the Christmas Eve transmission during the ninth orbit of the Moon. The mission and Christmas provided an inspiring end to 1968, which had been a troubled year for the US, marked by Vietnam War protests, race riots, and the assassinations of civil rights leader Martin Luther King, Jr., and Senator Robert F. Kennedy.

Question:
How much of the population of Earth ended up seeing the images of the Earth and the Moon?

one-quarter