ASTR 121

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Credit: 3 hours.

[IAI Code: P1906] Introductory survey of the Solar System; structure and motions of the Earth and Moon; planetary motions; natures and characteristics of the planets and smaller solar system bodies; planetary moons and rings; meteors, meteoroids, and meteorites; properties of the Sun; origin and evolution of the Solar System; discovery of extrasolar planetary systems; architecture of extrasolar planetary systems and comparison to our solar system; habitable extrasolar planets. Emphasis will be placed on problem-solving and scientific methods.

Students with credit in PHYS 211 are encouraged to take ASTR 210. Credit is not given toward graduation for: Credit is not given for ASTR 121 if credit in either ASTR 100 or ASTR 210 has been earned.

ASTR 121 and ASTR 122 cover the same topics as ASTR 100, but the material and topics are covered in much more depth over two semesters instead of one. ASTR 121 and ASTR 122 are independent offerings and can be taken in any order. While ASTR 121 and ASTR 122 are for non-science majors, problem solving with basic algebra is required. Science and astronomy majors should take ASTR 210. Students must register for one discussion and one lecture section.

This course satisfies the General Education Criteria in Spring 2026 for:

• Nat Sci & Tech - Phys Sciences
• Quantitative Reasoning II

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