Option 1: International Year of Reconciliation - This option suggests that the year 2009 is being celebrated by the UN as the International Year of Reconciliation. Reconciliation generally refers to the act of restoring friendly relations between individuals or groups. However, this option is not correct, as the correct answer is option 2.

Option 2: International Year of Astronomy - This option is the correct answer to the question. The United Nations celebrated the year 2009 as the International Year of Astronomy. This designation aimed to promote and raise awareness about the importance of astronomy and its contributions to science, education, and culture.

Option 3: International Year of Human Rights Learning - This option suggests that the year 2009 is being celebrated as the International Year of Human Rights Learning. Human rights learning refers to the process of acquiring knowledge and understanding of human rights principles, values, and responsibilities. However, this option is not correct, as the correct answer is option 2.

Option 4: All of the above - This option implies that all the three options mentioned above (options 1, 2, and 3) are correct, and the year 2009 is being celebrated as all of these. However, this option is not correct, as the correct answer