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Astronomy

Overview Degrees/Certificates Courses Faculty

Astronomy (ASTR) Courses

ASTR 300 Introduction to Astronomy

  • Units:3
  • Hours:54 hours LEC
  • Prerequisite:None.
  • Advisory:Successful completion of Algebra I/Integrated Math 1 or Beginning Algebra; AND eligibility for ENGL C1000/C1000H (formerly ENGWR 300/480) or ESLW 340
  • Transferable:CSU; UC (ASTR 300, 310 and 320 combined: maximum credit, two courses )
  • General Education:Local GE L5 (effective Fall 2025); Cal-GETC Area 5A (effective Fall 2025)
  • Catalog Date:August 1, 2025

This course covers topics in modern planetary and stellar astronomy, such as dwarf, jovian, terrestrial, and extrasolar planets and the life cycle of stars, black holes, and supernovae. It also includes topics on cosmology and galactic astronomy, such as dark matter, dark energy, the Big Bang, and the expansion of the Universe.

Student Learning Outcomes


ASTR 310 The Solar System

  • Units:3
  • Hours:54 hours LEC
  • Prerequisite:None.
  • Advisory:Successful completion of Algebra I/Integrated Math 1 or Beginning Algebra; AND eligibility for ENGL C1000/C1000H (formerly ENGWR 300/480) or ESLW 340
  • Transferable:CSU; UC (ASTR 300, 310 and 320 combined: maximum credit, two courses )
  • General Education:Local GE L5 (effective Fall 2025); Cal-GETC Area 5A (effective Fall 2025)
  • Catalog Date:August 1, 2025

This course explores the nature and evolution of the solar system. Topics include the night-time sky, the history of astronomy, the tools of astronomy, and the origins and characteristics of planets, their satellites, and other components of the solar system. It emphasizes how astronomers gain and refine their knowledge of the Universe and interpret the latest results of planetary exploration.

Student Learning Outcomes


ASTR 320 Stars, Galaxies, and Cosmology

  • Units:3
  • Hours:54 hours LEC
  • Prerequisite:None.
  • Advisory:Successful completion of Algebra I/Integrated Math 1 or Beginning Algebra; AND eligibility for ENGL C1000/C1000H (formerly ENGWR 300/480) or ESLW 340
  • Transferable:CSU; UC (ASTR 300, 310, and 320 combined: maximum credit, two courses; ASTR 320 and 480 combined: maximum credit, one course ASTR 320 and 481 combined: maximum credit, one course)
  • General Education:Local GE L5 (effective Fall 2025); Cal-GETC Area 5A (effective Fall 2025)
  • Catalog Date:August 1, 2025

This course explores the nature and evolution of stars, galaxies, and the Universe. Topics include the history of astronomy, the tools of astronomy, star classification, stellar evolution, neutron stars, black holes, and the Big Bang. It emphasizes how astronomers gain and refine their knowledge of the Universe and interpret the latest results of space exploration.

Student Learning Outcomes


ASTR 330 Introduction to Astrobiology

  • Units:3
  • Hours:54 hours LEC
  • Prerequisite:None.
  • Advisory:Successful completion of Algebra I/Integrated Math 1 or Beginning Algebra; AND eligibility for ENGL C1000/C1000H (formerly ENGWR 300/480) or ESLW 340
  • Transferable:CSU; UC (ASTR 300, 310 and 320 combined: maximum credit, two courses)
  • General Education:Local GE L5 (effective Fall 2025); Cal-GETC Area 5A (effective Fall 2025)
  • Catalog Date:August 1, 2025

This course explores the possibilities of life beyond Earth and what we can learn from terrestrial life forms surviving in extreme conditions. Topics include the origin, biology, and evolution of life on Earth, habitability and interior energy sources of Earth and other planets in the solar system, the likelihood of life existing on other planets or moons within our solar system, attempts to locate life within our solar system, and attempts to communicate with intelligent life in other parts of the galaxy.

Student Learning Outcomes


ASTR 400 Astronomy Laboratory

  • Units:1
  • Hours:54 hours LAB
  • Prerequisite:None.
  • Corequisite:ASTR 300, 310, 320, or 330
  • Transferable:CSU; UC
  • General Education:Cal-GETC Area 5C (effective Fall 2025)
  • Catalog Date:August 1, 2025

This course provides access to telescopes, covering their practical use for visual observation of astronomical objects and the analysis of astronomical data. Topics may include constellation identification, stellar spectroscopy, solar and lunar observations, radio-physics and radio-astronomy, image analysis, measuring the properties of stars, and determining the age of the Universe. Night-time on-campus field trips may be required.

Student Learning Outcomes


ASTR 481 Honors Astronomy: Stars, Galaxies, and Cosmology

  • Units:4
  • Hours:54 hours LEC; 54 hours LAB
  • Prerequisite:Placement into ENGWR 480 through the assessment process.
  • Advisory:MATH 100 or 132 with a grade of "C" or better
  • Transferable:CSU; UC (UC Credit limitation: ASTR 320 and 481 combined: maximum credit, one course)
  • General Education:Local GE L5 (effective Fall 2025); Cal-GETC Area 5A (effective Fall 2025); Cal-GETC Area 5C (effective Fall 2025)
  • Catalog Date:August 1, 2025

This seminar-style course is an in-depth introduction to astronomy, focusing on stars, galaxies, and cosmology. It approaches current topics in astronomy through discussions and laboratory activities, with an emphasis on critical thinking, problem-solving techniques, and conceptual reasoning. This course is not open to students who have completed ASTR 320.

Student Learning Outcomes


ASTR 495 Independent Studies in Astronomy

  • Units:1 - 3
  • Hours:54 - 162 hours LAB
  • Prerequisite:None.
  • Transferable:CSU
  • Catalog Date:August 1, 2025

Independent Study is an opportunity for the student to extend classroom experience in this subject, while working independently of a formal classroom situation. Independent study is an extension of work offered in a specific class in the college catalog. To be eligible for independent study, students must have completed the basic regular catalog course at American River College. They must also discuss the study with a professor in this subject and secure approval. Only one independent study for each catalog course will be allowed.


ASTR 499 Experimental Offering in Astronomy

  • Units:0.5 - 4
  • Prerequisite:None.
  • Transferable:CSU
  • Catalog Date:August 1, 2025

This is the experimental courses description.