ISRO’s 2025 timeline was one of India’s strongest years in space exploration. The agency marked major milestones in historic astronaut training, global satellite partnerships, deep-sea engineering breakthroughs and new indigenous technologies.
Axiom-4: Shubhanshu Shukla’s Historic ISS Stay
Indian astronaut Shubhanshu Shukla completed an 18-day mission on the ISS in July 2025 under the Axiom-4 programme.
During the mission, he:
- Completed seven India-led experiments on microgravity effects
- Logged 12 million km of travel and 280 Earth orbits
- Conducted live sessions with PM Modi and students
- Helped ISRO teams train with NASA and Axiom mission controllers
His mission strengthens India’s readiness for Gaganyaan and future space-station plans.
Major ISRO Missions in 2025
NVS-02 – India’s 100th Launch
Launch date: 29 Jan 2025
The GSLV-F15 launched the NVS-02 satellite, marking the 100th mission from Sriharikota. A valve issue kept the satellite in an elliptical orbit, but ISRO is evaluating its NavIC usability.
EOS-09 – A Rare PSLV Anomaly
Launch date: 18 May 2025
PSLV-C61’s third-stage issue prevented EOS-09 from reaching orbit, ending a long success streak. The radar satellite was designed for all-weather imaging.
NISAR – NASA–ISRO Climate Observatory
Launch date: 30 July 2025
One of ISRO’s largest collaborations, NISAR began global Earth imaging with its 12-metre radar antenna. It tracks forests, glaciers, land changes and climate patterns every 12 days.
CMS-03 – India’s Heaviest Communication Satellite
Launch date: 2 Nov 2025
LVM3 successfully placed CMS-03 into GTO, boosting India’s communication, broadband and strategic connectivity.
Boosting Indigenous Space Technology
ISRO and the Semiconductor Laboratory (SCL) introduced India’s first locally developed space processors:
- VIKRAM3201: 32-bit, flight-tested, built for extreme launch conditions
- KALPANA3201: Open architecture, supports next-gen avionics
The agencies also created mini-avionics systems and advanced sensors for future missions.
ISRO’s Role in India’s Deep-Sea Mission
As part of the Samudrayaan initiative, ISRO helped build the titanium crew sphere for MATSYA-6000, India’s human-occupied deep-sea submersible.
- 2.26-m sphere for 3 crew
- Withstands pressure 600x sea level
- Required 700 welding trials using upgraded 40-kW electron-beam technology
This marks a major step in India’s deep-ocean capabilities.