NASA Hubble Fellowship 2027 in USA | Prestigious Research Opportunity

The NASA Hubble Fellowship 2027 is accepting applications from early-career scientists interested in conducting independent astrophysics research in the United States. Administered by the Space Telescope Science Institute (STScI) on behalf of NASA, this competitive postdoctoral program supports researchers studying important questions about the universe.

Selected fellows can undertake up to three years of research at an approved US host institution. The fellowship provides salary support, employment-related benefits, and allowances for research activities.

Applications are open to qualified researchers from all nationalities, making the program particularly attractive to international scientists planning to advance their careers in astronomy, physics, and related disciplines.

The application deadline is October 28, 2026, with reference letters due November 4, 2026.

This guide explains the funding, eligibility requirements, required documents, research fields, application procedure, and selection process.

NASA Hubble Fellowship 2027 Details

The NASA Hubble Fellowship supports research contributing to NASA Astrophysics. It is a postdoctoral fellowship, not an undergraduate scholarship or general internship.

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NASA Hubble Fellowship Benefits

Selected fellows receive financial and professional support to pursue an independent research program.

The available benefits include:

• Salary or stipend: Annual financial support for the fellowship period.
• Health insurance support: Coverage arrangements depend partly on the host institution.
• Relocation assistance: Support for eligible relocation expenses.
• Research travel: Allowances for approved research-related travel.
• Computing and research costs: Resources for direct research expenses.
• Publication expenses: Support for eligible scientific publication costs.
• Research independence: An opportunity to lead an ambitious astrophysics research project.
• Professional development: Experience conducting research within the US astronomy community.

The program may continue for three years. Funding is provided initially for one year, with subsequent renewals depending on satisfactory performance and the availability of NASA funds.

The official announcement does not give a fixed salary amount applicable to all 2027 fellows, so applicants should not assume a specific annual salary.

Three fellowship categories

Successful researchers receive one of three traditional fellowship designations:

Einstein Fellows: Researchers exploring how the universe works.

Hubble Fellows: Researchers investigating how the universe and its structures developed.

Sagan Fellows: Researchers studying questions connected to life and the possibility of life elsewhere.

These categories reflect scientific interests rather than separate application competitions or fixed quotas.

International researchers interested in other fields can also explore our Fung Global Fellows Program 2027 guide for a different type of research fellowship at Princeton University.

NASA Hubble Fellowship Eligibility Criteria

To qualify, candidates must satisfy the program’s doctoral education and research requirements.

Academic requirements

Applicants must:

• Hold a PhD or equivalent doctoral-level research degree in astronomy, physics, or a related discipline.
• Have received the degree on or after January 1, 2023, or expect to complete all requirements before beginning the fellowship.
• Complete the doctoral degree requirements before commencing their fellowship in 2027.
• Demonstrate the ability to conduct independent research contributing to NASA Astrophysics.

Nationality requirements

The fellowship is open to English-speaking applicants of any nationality.

International applicants do not need to be US citizens simply to submit an application. However, successful non-US candidates must obtain the appropriate immigration permission for their research appointment.

Research requirements

Candidates should propose a technically feasible project that contributes to major astrophysics questions.

Applicants must also select potential host institutions that can support the proposed research.

Former and current NASA Hubble Fellowship Program fellows are not eligible to apply again.

For doctoral candidates seeking a different research environment, our CERN Technical Student Program 2027 article provides information about another international research and technical training opportunity, although its eligibility rules are different.

Available Research Fields

The NASA Hubble Fellowship 2027 supports research connected to NASA Astrophysics.

Potential research areas include:

• Observational astrophysics.
• Theoretical astrophysics.
• Cosmology and the early universe.
• Galaxy formation and evolution.
• Black holes and high-energy astrophysics.
• Exoplanets and planetary systems.
• Stellar formation and evolution.
• Astronomical instrumentation.
• Astrophysics data analysis and simulations.

Research involving the Sun, Earth, or Solar System is not automatically excluded, but the proposed work must clearly demonstrate its relevance to NASA Astrophysics.

The host institution should have suitable expertise and research facilities for the proposed project.

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Required Documents for NASA Hubble Fellowship 2027

Applicants must prepare a complete scientific application.

The principal requirements include:

• Completed online application form.
• Updated curriculum vitae.
• List of scientific publications.
• Research Overview document.
• Summary of previous and current research.
• Proposed future research program.
• Three letters of reference.
• Preferred US host institutions and the required justifications.
• Science-category and research-technique selections.

Research Overview

The Research Overview is limited to eight pages, including figures and tables, but excluding references.

It must contain two sections:

1. Summary of Previous and Current Research.
2. Research Proposal.

The proposal should explain the significance of the project, its feasibility, and its relevance to NASA Astrophysics.

Reference letters

Applicants must arrange for three references from individuals familiar with their scientific abilities.

Each reference letter may be no longer than three pages and must be submitted by its author through the designated system.

The referees do not automatically receive an upload link by email, so applicants should provide clear instructions well before the deadline.

How to Apply for NASA Hubble Fellowship 2027

Follow these steps to prepare and submit an application.

Step 1: Read the Official Announcement

Open the NASA Hubble Fellowship announcement and review the 2027 eligibility requirements, application instructions, and selection criteria.

Make sure your doctoral degree date satisfies the program’s rules.

Step 2: Develop Your Research Proposal

Identify a scientific question connected to NASA Astrophysics and prepare a feasible research plan.

Explain why the question matters, how you intend to investigate it, and what new knowledge your research could provide.

Step 3: Select Potential Host Institutions

Identify up to three eligible US research institutions in order of preference.

Your first and second host choices require written justifications of up to 250 words each in designated application fields.

Check whether your preferred institutions meet the program’s host requirements.

Step 4: Prepare Your Documents

Update your CV and publications list, prepare your Research Overview, and complete the required application details.

Ensure that your research document follows the official page limits and formatting rules.

Step 5: Contact Three Referees

Ask three suitable researchers or academic supervisors to provide letters evaluating your scientific abilities.

Give them the reference submission instructions and deadline.

Step 6: Complete the Online Application

Visit the official NASA Hubble Fellowship application portal.

Enter the requested information, select scientific categories, identify host institutions, and upload your documents.

Step 7: Submit Before the Deadline

Submit your complete application by October 28, 2026, at 7:00 p.m. US Eastern Daylight Time.

Do not wait until the last minute because technical difficulties or missing documents could affect your submission.

Step 8: Confirm Reference Submission

Ensure all three referees submit their letters by November 4, 2026, at 7:00 p.m. US Eastern Standard Time.

Step 9: Wait for the Selection Decision

The selection committee reviews applications during late 2026 and early 2027.

Successful candidates are expected to receive offers in early February 2027.

NASA Hubble Fellowship 2027 Deadline

The application deadline is Wednesday, October 28, 2026.

The main application and reference letters have different deadlines. Applicants should ensure they meet both.

Selection Process and Application Tips

The NASA Hubble Fellowship is highly competitive.

A selection committee reviews the applicant’s proposed scientific research, previous accomplishments, research preparation, and leadership potential.

What makes a strong application?

Develop an important scientific question. Show why your project could advance a major area of astrophysics.

Explain your methods clearly. Reviewers should understand how the research will be conducted and why it is feasible.

Connect your proposal to NASA’s scientific goals. Clearly explain its relevance to astrophysics without forcing an artificial connection to a particular mission.

Demonstrate independence. Highlight how your proposed research builds on, but also extends beyond, previous work.

Write for a broad scientific audience. Applications are reviewed by specialists and astrophysicists outside the applicant’s immediate research area.

Show leadership potential. Relevant mentoring, outreach, scientific collaboration, or community contributions can strengthen an application.

Choose suitable host institutions. Consider research facilities, academic collaborators, and host availability.

For 2027, the application also includes a field asking candidates to disclose any use of AI when preparing their materials. Applicants should answer that question accurately.

Researchers exploring additional international fellowships can read our Yale World Fellows Program 2027 guide for a separate leadership-focused program with its own eligibility requirements.

Frequently Asked Questions

1. Is the NASA Hubble Fellowship 2027 fully funded?

The program provides salary support, benefits, and allowances for eligible research expenses. The exact salary and benefit arrangements are determined under the program and host institution’s policies.

2. Can international applicants apply?

Yes. English-speaking researchers of any nationality may apply if they meet the academic and research requirements. Successful international fellows must satisfy applicable US visa requirements.

3. What is the application deadline?

Applications close October 28, 2026, at 7:00 p.m. EDT. Reference letters are due November 4, 2026.

4. Can master’s degree students apply?

A master’s degree alone does not satisfy the eligibility rules. Applicants must have a relevant doctoral research qualification completed within the program’s specified period or complete the requirements before the fellowship starts.

5. How long does the fellowship last?

The fellowship can run for up to three years, subject to satisfactory annual performance reviews and continued funding.

6. Do applicants need a confirmed US host institution?

Applicants identify preferred eligible host institutions in their application. Successful candidates must subsequently obtain the required institutional endorsement. Candidates should review the program’s rules before selecting hosts.

Final Thoughts

The NASA Hubble Fellowship 2027 offers an outstanding opportunity for early-career astrophysics researchers to pursue independent scientific projects in the United States.

Its combination of salary support, research allowances, and opportunities to work within the US astronomical research community makes it particularly valuable for scientists who want to establish independent research careers.

However, the program is intended for advanced researchers, and applicants must prepare a substantial scientific proposal supported by strong academic references.

The most important priority is to begin preparing the research proposal and coordinating recommendation letters early.

Students interested in a different kind of research opportunity can also explore our EPFL Excellence Fellowships 2027 guide.

The NASA Hubble Fellowship application closes on October 28, 2026.

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Author: Muhammad Khayam Afridi — Founder & Editor

Global Scholarship Point

Information verified against official NASA and STScI guidance on October 13, 2026.