For many Indian students, ISRO is not just an organisation—it’s a dream. Working with the Indian Space Research Organisation means contributing to missions that make the entire country proud. If you’re a college student looking for real exposure to India’s space ecosystem, the ISRO 21 Days Internship 2026 is one of the most prestigious opportunities you can apply for.
This internship is conducted through ISRO Inertial Systems Unit (IISU) and is especially popular during the Summer Internship 2026 period. It is offline, research-oriented, highly competitive, and meant for serious students interested in space science, engineering, and advanced technology.
In this article, you’ll get complete, genuine, and student-friendly information about the ISRO IISU Summer Internship 2026—including eligibility, duration, application process, selection method, stipend details, certificate value, and important tips.
What is ISRO 21 Days Internship 2026?
The ISRO 21 Days Internship is a short-term research internship programme offered by ISRO through its specialised centres like IISU. Selected students work in unclassified technical areas under the guidance of experienced ISRO scientists.
Unlike online internships or certificate-only programs, this internship is:
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Completely offline
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Research and lab-oriented
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Conducted at actual ISRO facilities
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Focused on real-world space technology exposure
Internship Duration
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Minimum: 21 Days
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Maximum: 45 Days (depends on project & availability)
About IISU – ISRO Inertial Systems Unit
IISU (Inertial Systems Unit) is one of ISRO’s most critical centres, located in Thiruvananthapuram, Kerala. It plays a vital role in India’s launch vehicle and space missions.
Key Areas of Work at IISU
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Inertial Navigation Systems
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Guidance & Control Systems
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Launch Vehicle Technologies
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Advanced Sensors & Space-grade Electronics
Interning at IISU means working close to the core technologies behind India’s space missions, making this internship extremely valuable for engineering and science students.
ISRO Summer Internship 2026: Duration & Schedule
ISRO IISU offers internships in two blocks every year:
Internship Blocks
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Summer Internship: May to July 2026
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Winter Internship: October to December 2026
For most college students, the Summer ISRO Internship 2026 is the preferred option as it aligns with semester vacations.
Eligibility Criteria for ISRO 21 Days Internship 2026
ISRO follows strict eligibility rules, and meeting them does not guarantee selection.
Basic Requirements
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Must be an Indian citizen
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Must be pursuing a full-time regular degree
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Institution must be recognised
Eligible Courses
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BE / BTech / BSc / BS-MS / Integrated MSc
(after completing 4th semester) -
ME / MTech / MSc
(after completing 1st semester) -
PhD scholars (coursework completed)
Minimum Marks
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60% aggregate marks OR
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CGPA 6.32 / 10
⚠️ Important Rules
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Only one ISRO internship per degree is allowed
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Fulfilling eligibility ≠ selection confirmation
ISRO IISU Internship 2026: Stipend Details
This is the most common doubt among students.
❌ No stipend is provided
❌ No accommodation or travel allowance
The ISRO 21 Days Internship is a learning and exposure-based programme, not a paid internship. However, the ISRO brand value and certificate credibility are far more valuable than monetary benefits.
How to Apply for ISRO 21 Days Internship 2026?
The application process is formal and offline-style, unlike private internship portals.
Step-by-Step Application Process
Step 1: Get Application Form
Download the official IISU internship application format from ISRO/IISU sources.
Step 2: Fill the Form Carefully
Mention:
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Personal details
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Academic information
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Area of interest
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Preferred internship duration
Step 3: Institutional Approval (Mandatory)
The form must be signed & stamped by:
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Head of Department (HOD)
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Principal of the college
Without approval, applications are rejected outright.
Step 4: Attach Required Documents
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Updated biodata / resume
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Mark sheets (up to current semester)
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Signed application form
Step 5: Submit the Application
Applications can be sent:
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By Post to IISU, Thiruvananthapuram
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By Email (scanned copies) to official IISU email ID
👉 Always apply well before the deadline.
Selection Process – How ISRO Chooses Interns
ISRO follows a centralised selection process based on:
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Academic performance
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Relevance of discipline
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Availability of scientists & facilities
⚠️ Very Important
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Students are NOT contacted directly
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Selection communication is sent to HOD / Principal
So stay in touch with your college authorities after applying.
Internship Certificate & Learning Outcomes
After successful completion, students receive an official ISRO IISU Internship Certificate, which holds strong value for:
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Higher studies (India & abroad)
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Research & core engineering roles
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PSU & government jobs
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Resume & LinkedIn credibility
What Students Actually Gain
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Research exposure
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Professional discipline
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Understanding of space-grade technologies
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Mentorship from top scientists
Why ISRO 21 Days Internship is Worth It
Even though it’s short and unpaid, this internship offers:
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Real exposure to India’s space ecosystem
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Experience no private internship can match
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Strong academic & career credibility
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Confidence boost for serious tech aspirants
If you’re genuinely interested in space, science, or core engineering, this internship can be a career-defining experience.
Important Tips for Students
✔ Apply early—last-minute applications often fail
✔ Ensure documents are properly signed & stamped
✔ Choose your area of interest wisely
✔ Follow up with your HOD after applying
✔ Don’t apply casually—ISRO values seriousness
Final Thoughts
The ISRO 21 Days Internship 2026 through IISU is not for everyone—and that’s exactly what makes it special. It’s designed for students who are curious, disciplined, and genuinely passionate about learning.
If space science excites you and you’re ready for real exposure, the Summer ISRO Internship 2026 is absolutely worth applying for.
👉 Prepare early, stay patient, and give it your best shot.
For the latest internship and job updates, visit: aicteinternshipupdates.com
