A star-forming region in the Large Magellanic Cloud, an irregular galaxy. Astronomy (from Greek: á¼ÏÏÏÎ¿Î½Î¿Î¼Î¯Î±) is a natural science that studies celestial objects and phenomena. It applies mathematics, physics, and chemistry, in an effort to explain the origin of those objects and phenomena and their evolution.
2015-02-25T12:30:07-05:00. A former pro-US leader in Iran was Shah Mohammed Reza Pahlavi. HIs regime was overthrown in 1979 by the Islamic Revolution and Ayatollah Khomeini came to power. Comments
Below is a brief overview of the key components of Iran's government and political system. At the top of Iran's power structure is the Supreme Leader, Ayatollah Ali Khamenei, who succeeded Ayatollah Ruhollah Khomeini, the father of the Iranian Revolution, upon Khomeini's death in 1989. Khomeini and Khamenei are the only two men to have held the office since the founding of the Islamic Republic in 1979.