ASTR 141Cosmology
Astronomy · 4 units · Undergraduate upper division (100-199)
Designed for upper-division Astrophysics and Physics majors. In-depth exploration of Big Bang model for universe. Examination of what expanding universe is, how cosmologists measure its properties, and how universe has changed since Big Bang. Topics include cosmic expansion, dark matter, inflation, cosmic microwave background, Big Bang nucleosynthesis, and structure formation.
P/NP or letter grading.
When it runs
- Winter 2026
- Winter 2027
Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.
Requisites
Official UCLA wording
Requisites: courses 115, 117.
Requires
Everything that has to come before this course, not just the courses named in the requisite above.
ASTR 141
- ASTR 115Introduction to Galactic Astronomy
- ASTR 117Introduction to Extragalactic Astrophysics
- PHYSICS 1AHPhysics for Scientists and Engineers: Mechanics (Honors)
- MATH 32BCalculus of Several Variables
2 direct requisites. The whole upstream is here — 23 courses over 3 levels. Every course here opens its own tree.
Unlocks
What this course is a requisite for, and what those courses lead to in turn.
No course in the catalog lists this as a requisite.