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The author discusses planets, their definition, and discoveries of objects that may qualify as planets, asteroids, or satellites. The author qualifies planets as being round or spherical and large, but not necessarily orbiting a star. The author mentions the International Astronomical Union (IAU) and its definition of a planet conceived in 2006.

A roundtable is presented in which the topic of researching extrasolar planets for signs of life is discussed. The discussion includes Gibor Basri, astrophysicist at the University of California, Berkeley; John A. Johnson, astronomer at Caltech; Sara Seager, planetary scientist and astrophysicist at the Massachusetts Institute of Technology; and Tori Hoechler, astrobiologist at the Ames Research Center. Topics include habitability on other planets, funding for research, and how life is detected.

The article presents discussion concerning the astronomical search for vulcanoids, or small planetoids between the orbit of Mercury and the Sun. Details are given noting the apparent emptiness of the region and why such a phenomena is illogical. The efforts of both historical and contemporary astronomers to find the bodies are described. Several theories are presented suggesting that planetoids may be in the region but invisible to astronomical observation instruments.

Presents answers to questions regarding meteorite value, planetary collisions, and units of astronomical measurements. Definition of arcsecond and arcminute; Discussion on planetary formation; Details on the atmosphere of Venus.

Provides answers to different astrology-related questions. Difference between astrology and astronomy; Information on meteors that man sees as shooting stars.

Presents questions and answers pertaining to astronomy. How to make a three-dimensional photograph of Supernova; Details on the molten state of the interior layer of the Earth; Information on colliding galaxies.