---
title: "SAST4: Universe Origin and Galaxies (Georgia Science standard)"
code: SAST4
cite_as: Georgia Standards of Excellence, Science, SAST4
subject: science
grades:
  - high-school
language: en
canonical_url: https://georgiahomeroom.org/standards/code/SAST4
md_url: https://georgiahomeroom.org/standards/code/SAST4.md
alternate_language_url: https://georgiahomeroom.org/es/standards/code/SAST4.md
source_url: https://case.georgiastandards.org/ims/case/v1p1/CFDocuments/27a08dc6-416e-11e7-ba71-02bd89fdd987
source_last_changed: 2025-05-29
data_built: 2026-09-18
publisher: Georgia Homeroom, a free public-interest project of Georgia Civic Data. Not affiliated with or endorsed by the Georgia Department of Education or any school district.
up: https://georgiahomeroom.org/standards/science/high-school.md
index: https://georgiahomeroom.org/standards/index.md
---

# SAST4: Universe Origin and Galaxies

Obtain, evaluate, and communicate information to describe the scientific view of the origin of the universe, the evolution of matter, and the development of galaxies.

- Subject: Science
- Appears in: High School, https://georgiahomeroom.org/standards/science/high-school.md

## Expectations

- **SAST4.a**: Construct an argument from evidence in support of the Big Bang theory. (Clarification statement: This includes but is not limited to the cosmological principle, cosmic microwave background radiation, and space-time expansion.)
- **SAST4.b**: Use models to describe the conditions of the early universe that led to the formation and evolution of matter as well as the birth of the first stars and galaxies.
- **SAST4.c**: Construct an explanation using indirect evidence to support the existence of dark matter and dark energy.
- **SAST4.d**: Develop and use models to relate how galactic evolution occurs through mergers and collisions.

## Georgia Milestones coverage

No Georgia Milestones blueprint cites this standard.

Source: Georgia Standards of Excellence, published by the Georgia Department of Education at case.georgiastandards.org.