ASTR 117Introduction to Extragalactic Astrophysics
Astronomy · 4 units · Undergraduate upper division (100-199)
Open to qualified sophomore and upper-division students. Introduction to formation and evolution of universe from Big Bang to structure formation and galaxy evolution. Development of physics behind our modern understanding of universe on large scales. Including role of dark matter and dark energy. Introduction of energetic phenomena such as active galactic nuclei and quasars.
P/NP or letter grading.
When it runs
- Spring 2026
- Spring 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 81, 115, Mathematics 31A, 31B, and Physics 1A or 1AH.
BruinTree reads · Prerequisite
confidence 1.00 · from textRequires
Everything that has to come before this course, not just the courses named in the requisite above.
ASTR 117
- ASTR 81Fundamentals of Astrophysics
- ASTR 115Introduction to Galactic Astronomy
- MATH 31ADifferential and Integral Calculus
- MATH 1Precalculus
- PHYSICS 1APhysics for Scientists and Engineers: Mechanics
- MATH 32ACalculus of Several Variables
- MATH 31BIntegration and Infinite Series
- PHYSICS 1AHPhysics for Scientists and Engineers: Mechanics (Honors)
- MATH 32BCalculus of Several Variables
6 direct requisites. The whole upstream is here — 24 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.
ASTR 117
- ASTR 127Stars from Birth to Death
- ASTR 140Galaxies
- ASTR 141Cosmology
- ASTR 142Data and Computation in Astrophysics
- ASTR 144Star Formation and Interstellar Medium
- ASTR 146Astronomical Instrumentation
6 courses list this as a requisite. The whole downstream is here — 6 courses over 1 level. Every course here opens its own tree.