NASA Hubble Fellowship Programme (NHFP) 2027 in USA

The NASA Hubble Fellowship Programme (NHFP) 2027 in USA is now accepting applications from recent postdoctoral scientists who want to pursue independent research connected to NASA Astrophysics. The programme plans to award 24 new fellowships, subject to NASA funding, with research hosted at eligible institutions in the United States. Applications opened on September 8, 2026, and the main application deadline is October 28, 2026, at 7:00 PM EDT.

The fellowship is not limited to research using the Hubble Space Telescope. NHFP covers the breadth of NASA Astrophysics, and successful applicants are designated as Einstein, Hubble, or Sagan Fellows according to the scientific focus of their proposed research.

For the 2027 cycle, applicants must generally have earned a doctoral degree in astronomy, physics, or a related discipline on or after January 1, 2023, or be on track to complete the degree before September 2027. The programme is open to applicants of any nationality who are English-speaking.

NASA Hubble Fellowship Programme 2027 at a Glance

The official STScI Announcement of Opportunity states that the NHFP provides salary support, benefits, and an additional allowance for travel and other research costs for up to three years.

What Is the NASA Hubble Fellowship Programme?

The NASA Hubble Fellowship Program is a postdoctoral fellowship programme designed to support promising early-career astrophysicists conducting independent research that contributes to NASA Astrophysics. Research can involve theory, observation, experimentation, or instrument development.

Although the name includes “Hubble,” NHFP is broader than Hubble Space Telescope research. The programme combines the scientific areas previously covered separately by the NASA Einstein, Hubble, and Sagan Fellowship programmes. After selection, fellows receive one of three designations:

• Einstein Fellow: How does the Universe work?
• Hubble Fellow: How did we get here?
• Sagan Fellow: Are we alone?

There are no separate quotas for the Einstein, Hubble, and Sagan categories. The only programme-wide limit is the total number of new fellowships. Therefore, the designation itself does not create a separate admissions competition.

NASA Hubble Fellowship Programme 2027 Benefits

NHFP is commonly described by scholarship websites as a fully funded fellowship. A more precise description is that the programme provides salary or stipend support, benefits, and research-related funding, rather than publishing one universal fixed scholarship amount for every fellow.

The official 2027 announcement states that the NHFP provides:

• Salary support for the fellowship.
• Benefits associated with the host institution.
• Health insurance support.
• Relocation support.
• Travel support.
• Computing services.
• Publication costs.
• Other direct research costs.

The official announcement does not publish a single fixed dollar salary figure in the application notice. It says the initial annual salary or stipend is comparable to other prize fellowships and is subject to annual review and adjustment. Benefits such as retirement, family leave, and the precise structure of health coverage can depend on the host institution and whether the fellow is treated as an employee or a stipendiary fellow.

This distinction matters when comparing NHFP with scholarships that advertise a fixed cash award.

How Long Is the NHFP Fellowship?

The NASA Hubble Fellowship can last up to three years.

Funding is initially provided for the first year. Renewals for the second and third years depend on satisfactory annual performance reviews and the availability of NASA funding. The fellowship is therefore not an automatic three-year commitment at the point of application.

The 2027 fellowship can begin no earlier than August 1, 2027, and no later than January 1, 2028.

Who Is Eligible for the NASA Hubble Fellowship Programme 2027?

The current eligibility rules are important because older NHFP articles may show a different doctoral-degree cutoff.

For the 2027 NHFP cycle, you should meet these core requirements:

Doctoral degree

You must have earned your PhD or equivalent doctoral-level research degree in astronomy, physics, or a related discipline on or after January 1, 2023.

Applicants who have not yet formally received the degree when applying can still be considered, provided they complete all degree requirements before beginning the fellowship.

Research area

Your proposed research must contribute to NASA Astrophysics. The programme allows a broad range of astrophysics research, including theoretical, observational, experimental, and instrumental work.

The proposal does not necessarily have to focus on one specific NASA mission. Even research involving the Solar System, Sun, or Earth is not automatically excluded when its relevance to NASA Astrophysics is clearly established.

Nationality

The programme is open to applicants of any nationality. The official announcement specifies English-speaking applicants.

Previous NHFP fellows

Former and current NHFP Fellows are not eligible to apply again under the stated 2027 rules.

Do You Need a U.S. Host Institution?

Yes. NHFP research is carried out at an eligible U.S. host institution.

Applicants can propose host institutions where they would like to conduct their research, but the institution must meet the NHFP host employment requirements. Host institutions must be located in the United States or its territories.

The 2027 cycle has an important host-cap update. Normally, no more than two new fellows can be approved for a single institution in a given year. An institution that accepts two new fellows in one year can accept only one new fellow the following year.

For fellows starting in 2027, the following institutions can accept only one new NHFP fellow because they accepted two new fellows for 2026:

• California Institute of Technology
• Harvard University
• Institute for Advanced Study
• Johns Hopkins University
• Massachusetts Institute of Technology
• Princeton University
• Smithsonian Astrophysical Observatory
• Stanford University

This makes host selection an important part of the application strategy.

Applicants are asked to propose up to three prospective host institutions in order of preference. If selected, the first-choice host must provide an institutional endorsement letter.

Application Requirements for NHFP 2027

The application is more research-focused than a typical scholarship application.

Applicants must submit the following materials through the NHFP application system:

1. Completed NHFP application form
2. Curriculum vitae
3. List of publications
4. Research Overview

The Research Overview is limited to eight pages including tables and figures. It contains two major components:

• Summary of Previous and Current Research
• Research Proposal

References are placed at the end and do not count toward the page limit.

The application materials must be submitted as PDFs. The current instructions also state that materials should use at least 12-point font, single spacing, one-inch margins, and each file should be kept below 2 MB.

What You Should Not Attach

The official checklist specifically says not to attach extra materials such as:

• Reprints
• Preprints
• Cover letters
• Cover sheets

Submitting more documents does not automatically strengthen an NHFP application. Follow the listed requirements instead.

Research Proposal: What Does NHFP Look For?

The research proposal is the most important part of the application.

The selection committee says NHFP applicants are primarily judged on whether they present an important, persuasive, technically feasible research programme capable of advancing the frontiers of astrophysics and producing lasting impact.

The programme also evaluates:

Previous research and preparation

Reviewers consider your education, experience, technical skills, productivity, scientific impact, and publication record.

Importantly, the official criteria tell reviewers to distinguish a candidate’s preparation from academic “pedigree.” In other words, attending a highly prestigious university or working with a famous adviser is not supposed to substitute for evidence of scientific preparation and achievement.

Leadership potential

NHFP also considers leadership within the broader scientific community. Examples can include:

• Leading collaborations
• Organizing conferences or workshops
• Mentoring students
• Science communication
• Outreach
• Community service

The programme also allows reviewers to consider resilience when it is demonstrated through an applicant’s record.

For a strong application, it is therefore not enough to describe what you want to study. You need to make a convincing case that the project matters, that you are prepared to execute it, and that you can contribute to the wider research community.

How Many Recommendation Letters Are Required?

The 2027 NHFP application requires three letters of reference.

Applicants should choose people who are familiar with their scientific abilities. The official instructions encourage concise letters, with each letter limited to three pages maximum, including the salutation and signature.

A critical detail is that the reference-letter deadline comes one week after the main application deadline.

For 2027:

• Main application: October 28, 2026, 7:00 PM EDT
• Reference letters: November 4, 2026, 7:00 PM EST

Reference letters must be uploaded as PDFs through the designated submission system. Letter writers do not receive an automated email containing a submission link, so applicants should communicate the submission process clearly with their referees.

NASA Hubble Fellowship Programme 2027 Important Dates

The 2027 schedule is now published by STScI:

The official application page confirms that the application deadline is October 28, 2026.

How to Apply for the NASA Hubble Fellowship Programme 2027

The application process can be broken into a few practical steps.

1. Check your eligibility

Confirm your doctoral degree date, field, research area, and previous NHFP status before preparing the full application. The 2027 doctoral cutoff is January 1, 2023, subject to the rule for applicants who will complete their degree before September 2027.

2. Choose potential host institutions

Identify up to three eligible U.S. host institutions and research contacts whose facilities and scientific environment fit your project.

Check the official host-institution list rather than assuming that every U.S. university can accept an NHFP fellow. The host must comply with NHFP employment requirements.

3. Develop the research overview

Build the eight-page Research Overview around your previous and current research plus a focused future research programme.

Make the NASA Astrophysics relevance obvious. The proposal should be understandable to both specialists and astrophysicists outside your exact subfield because NHFP applications are read by experts and researchers from other areas.

4. Submit the application

Upload the required application form, CV, publication list, and Research Overview through the official NHFP application system by October 28, 2026, at 7:00 PM EDT.

5. Follow up with referees

Do not treat the November 4 letter deadline as an automatic grace period for your application. Your own application is still due on October 28. Confirm that all three referees understand how and when to submit their letters.

How Are NHFP Fellows Selected?

Applications are reviewed by the NHFP Selection Committee between November 2026 and January 2027.

The committee first considers the scientific quality and potential of the proposed research, followed by the applicant’s preparation, past research, and leadership potential. The official criteria make clear that the research programme is the central element of the evaluation.

Applications are reviewed by both subject-area experts and astrophysicists from other areas. This means your proposal should be scientifically sophisticated without becoming so specialized that a knowledgeable astrophysicist outside your niche cannot understand why the work matters.

Fellowship offers are expected by early February 2027, and successful candidates must accept or decline no later than February 15, 2027.

Is the NASA Hubble Fellowship Fully Funded?

NHFP provides substantial financial support, but “fully funded” should be understood carefully.

The official programme provides salary or stipend support, benefits, and additional support for research-related costs, including health insurance, relocation, travel, computing, publications, and other direct research costs.

However, STScI does not present the 2027 announcement as a scholarship with one fixed annual dollar award. The starting salary or stipend is described as comparable to other prize fellowships and subject to review and adjustment. Benefits can also vary by host institution.

So, it is reasonable to describe NHFP as a highly funded postdoctoral fellowship, but applicants should not assume that a generic “$X per year” figure found on an unofficial scholarship site is the official 2027 award amount.

Can International Applicants Apply?

Yes. The 2027 NHFP is open to applicants of any nationality.

International applicants who receive an offer must meet the visa requirements associated with their U.S. host institution. The official NHFP announcement states that non-U.S. nationals offered awards must have an appropriate visa for the duration of the fellowship.

This means being an international applicant does not by itself prevent you from applying, but immigration and host-institution arrangements become important after selection.

Common Mistakes to Avoid

The strongest way to improve your NHFP application is to avoid mistakes that can undermine an otherwise strong scientific case.

Using the wrong PhD cutoff: Older NHFP pages may refer to 2022 or earlier cycles. For the 2027 call, the stated cutoff is January 1, 2023, with the separate rule for applicants finishing before September 2027.

Choosing a host without checking its status: NHFP host caps can affect whether a university can take a fellow in a particular year. The 2027 cycle contains updated caps for several major institutions.

Treating the proposal as a narrow thesis summary: NHFP reviewers explicitly value broad scientific importance and feasibility. Your proposal should explain the question, why it matters, what you will do, and what the work can contribute to astrophysics.

Submitting extra documents: The current instructions specifically say not to attach reprints, preprints, cover letters, or other materials that are not requested.

Leaving reference letters until the last minute: The letter deadline is separate from the application deadline and the system requires referees to submit their PDFs themselves.

Final Thoughts

The NASA Hubble Fellowship Programme (NHFP) 2027 in USA is a postdoctoral research opportunity for early-career astrophysicists who want several years of protected support for independent scientific work. The current call plans for up to 24 fellowships, with salary support, benefits, and research-related allowances.

The most urgent date is October 28, 2026, at 7:00 PM EDT. The reference-letter deadline is November 4, 2026. Before applying, confirm that your PhD timing fits the 2027 rules, check your prospective U.S. hosts, and make the scientific importance of your proposed programme clear.

For the authoritative application instructions, eligibility rules, host requirements, and application link, use the official NASA Hubble Fellowship Program page at the Space Telescope Science Institute rather than relying on third-party scholarship summaries.