Space telescopes orbiting Earth

NASA and ESA space telescope (launched 1990)

NASA space observatory

PROBA-3 is a dual-probe technological demonstration mission by the European Space Agency devoted to high-precision formation flying to achieve scientific coronagraphy. It is part of the series of PROBA satellites that are being used to validate new spacecraft technologies and concepts while also carrying scientific instruments. It lifted off aboard ISRO's PSLV-XL rocket from Satish Dhawan Space Center in Sriharikota, India. The project is managed by Damien Galano.

CubeSat testing technologies for the detection of exoplanets

thumb|XPoSat being tested on Earth The X-ray Polarimeter Satellite (XPoSat) is an ISRO-manufactured space observatory to study polarisation of cosmic X-rays. It was launched on 1 January 2024 on a PSLV rocket, and it has an expected operational lifespan of at least five years.