TOEFL 79 IBT, 550 PBT, 6.50 IELTS.
There are several components to a complete application:

Application to the Astronomy Graduate Program and the Graduate School

Statement of interest

Transcripts

Not required for applications for Fall 2020 admissions. See below. Official GRE Scores (General Exam, the GRE Physics subject exam is NOT required)

Three (3) Letters of Recommendation

Details for each of these components are given below:

Application: For admission to the NMSU Astronomy Graduate Program, you must apply through the NMSU Graduate School electronic application system. Through that system (called Slate) you will enter your personal data, list your recommenders, upload documents, and pay the application fee.

Statement of interest: In order to help us evaluate how you might fit into our department, please provide a brief description of your research interests. If you have direct experience with astronomical research, then tell us about the specific problem(s) that you have worked on, what your responsibilities were, what you learned from the process, and how this engagement inspired you to want to apply to graduate school. Also, let us know if you have experience writing papers, delivering presentations or posters, or attending meetings. Alternatively, if you have not been directly involved in research, please tell us which classes, instructors, or other experiences have inspired you to apply to our program. As you write, keep in mind that we are looking to understand how your interests and experiences might be a good match for NMSU's research groups. A CV is not required, but is generally helpful, so feel free to upload one as a separate document.

Transcripts from all colleges and universities attended (unofficial transcripts are acceptable for the initial application, official versions are required for admitted candidates). The university requires a minimum of 3.0 GPA (or equivalent) for regular admission

The General GRE and the Physics subject GRE exams are NOT required by the Department of Astronomy any longer. The scores will not be considered in any part of the admissions process. If you have taken the exam and asked that your scores be forwarded to NMSU, they will not be reviewed.

Three letters of recommendation. Please make sure to enter the names and contact information for three letter writers in your application. A notification will be sent to them by the system to submit their letters before the deadline.