A major chosen after arrival
Yale says every student begins undeclared and has until the end of sophomore year to choose from over 80 majors. The pages read describe no separate application to Astronomy.
Undergraduate · Yale College
Yale Astronomy: the B.A. route, breadth over specialisation
Yale College admits students without a declared major, and Astronomy is a major they can choose once enrolled. Yale's catalogue describes the B.A. in Astronomy as designed for students who do not plan a graduate programme in astronomy, with greater flexibility than the B.S. in Astrophysics, ten courses beyond the prerequisites and a one-term senior essay or project. This guide makes no claim of a separate application to Astronomy.
Official information · read 1 November 2026, no entry-year label
What Yale says about Yale Astronomy
Taken from the Yale College Programs of Study 2026–2027 entry for Astronomy & Astrophysics and Yale Undergraduate Admissions' Majors, Standardized Testing and International pages, read on 1 November 2026. The pages carry no entry-year label, so for a 2028-entry application every statement below is evidence for the previous cycle and may change; check Yale's pages for the 2028-entry details.
A B.A. in Astronomy
The department offers a B.A. in Astronomy and a B.S. in Astrophysics.
Breadth over specialisation
The catalogue says the B.A. allows greater flexibility than the B.S. because the emphasis is on breadth.
Ten courses beyond the prerequisites
The B.A. senior requirement is a senior essay or independent research project in ASTR 4920.
The SAT or ACT is required
Yale's testing policy requires scores from either test; international applicants meet the same requirements.
Official sources
- Yale Undergraduate Admissions: Majors & Academic Programsadmissions.yale.edu
- Yale College Programs of Study 2026–2027: Astronomy & Astrophysicscatalog.yale.edu
- Yale Undergraduate Admissions: Standardized Testingadmissions.yale.edu
Read on 1 November 2026 on the Yale College Programs of Study 2026–2027 entry for Astronomy & Astrophysics and Yale Undergraduate Admissions' Majors, Standardized Testing and International pages, which describes 2027 entry. The pages carry no entry-year label. Yale's department website, the course listings behind each course code, deadlines and financial aid were not read, and the admissions pages do not mention A-levels or the IB by name and are not stated.
The major
What the catalogue says the Astronomy major is
Yale's catalogue calls astronomy and astrophysics quantitative physical sciences that apply physics, mathematics and statistical analysis to observing, describing and modelling the universe. The department offers a B.A. in Astronomy, intended for students who plan to continue in adjacent fields such as science policy and science journalism, and a B.S. in Astrophysics. The B.A. is designed for students who do not plan a graduate programme in astronomy, requires ten courses beyond the prerequisites and ends in a one-term senior essay or research project. All prerequisites should be completed by the end of sophomore year.
Is it the right major?
Astronomy beside Applied Physics and Earth and Planetary Sciences
Yale describes these as separate majors, so the choice is made after admission. Avandy's comparison is general.
Astronomy fits if
you want a physical-science grounding for a broad career without a graduate-school commitment.
Applied Physics fits if
you want physics applied to engineering problems. Avandy's Yale Applied Physics guide covers it.
Earth and Planetary Sciences fits if
you want the planet as the object of study. Avandy's Yale Earth and Planetary Sciences guide covers it.
Admission and testing
A Yale College application and the SAT or ACT
Yale requires first-year applicants to submit SAT or ACT scores and has no preference between them. International applicants complete the same application with the same requirements, and the admissions pages read do not mention A-levels or the IB by name. The major is chosen after admission, not applied for separately. This guide states no score.
A decision framework
Three questions before you commit
This is Avandy's own framework, not Yale's.
Will you continue in astronomy after Yale?
The catalogue separates the B.A. from the B.S. in Astrophysics for graduate-school-bound students.
Are physics and calculus in place?
The B.A. prerequisites include physics sequences and a mathematics sequence.
Can you plan the SAT or ACT with your A levels or IB?
Yale's testing policy requires scores from either test.
Planning for 2028 entry
Planning for 2028 entry: what carries over and what is awaiting publication
Yale's pages carry no entry-year label, so nothing on them is confirmed for 2028 entry. Use them to understand the structure of the application, then check Yale's own pages for the 2028-entry details.
The requirements and descriptions on the pages read on 1 November 2026, which carry no entry-year label
These are the best guide to what to prepare. Yale has not confirmed them for 2028 entry.
Deadlines, fees, financial aid and any department prerequisites not quoted here: not stated
This guide has not read them. Check Yale for the values that apply to your application year.
What to do now
Read the Astronomy & Astrophysics entry in Yale's Programs of Study and plan the SAT or ACT alongside your A levels or IB.
Support
Independent support with planning your own application
Avandy provides independent academic and admissions support. It is not affiliated with Yale College or any of its colleges or departments. Preparation sits within the Avandy Trinity Advisory Model: a Strategic Admissions Consultant, a PhD-level Academic Mentor and a Subject-specific Tutor, working to the actual requirements of each course. Support here is limited to understanding the requirements and planning the applicant's own work; Avandy does not write or edit essays, does not submit any materials and has no partnership with Yale College. No outcome is promised.
Questions
Questions applicants ask
Can I apply directly to Yale Astronomy?
The pages read describe admission to Yale College. Students begin undeclared and choose a major by the end of sophomore year.
What is the difference between the Astronomy B.A. and the Astrophysics B.S.?
The catalogue says the B.A. is for students who do not plan to continue in a graduate programme in astronomy, with greater flexibility; the B.S. is designed to provide a strong foundation for graduate study or a career in astronomy, physics or a related science.
Is there a senior project?
Yes. The B.A. senior requirement is a senior essay or independent research project carried out for one term in ASTR 4920.
Do I need the SAT or ACT?
Yes. Yale's testing policy requires scores from either test.
Does Yale name A-levels or the IB on these pages?
No. The admissions pages read do not mention them by name.
Are these the rules for 2028 entry?
No. They are Yale's wording with no entry-year label. Check Yale's pages again when Yale publishes its 2028-entry requirements.
Students and families
Talk to us about Yale Astronomy
Tell us about the student's curriculum, their physics and mathematics, how they weigh astronomy against astrophysics and their SAT or ACT plan, the universities on the list, and the intended year of entry. A senior adviser will review the academic profile before recommending how to prepare.