Currently, sci.esa.int is under review and not being updated. For the latest information and news from ESA science missions and scientific results, please visit esa.int. For a comprehensive overview of ESA’s Science Programme and its missions, please refer to science.esa.int. For in-depth technical information aimed at ESA's scientific communities, you may also wish to consult cosmos.esa.int.

News Archive

News Archive

ESA's first satellite: COS-B
This weekend sees the 40th anniversary of the launch of COS-B, the first satellite to be launched under the banner of the newly created European Space Agency, on 9 August 1975.
Published: 7 August 2015
Cos-B: 30 Years On
On 9 August 1975 ESA's first scientific satellite, Cos-B, was launched. Cos-B was ESA's first foray into producing a spacecraft with a single payload: a high-energy gamma-ray telescope. The mission was a remarkable success and returned the first detailed observations of gamma-ray emission from within our galaxy.
Published: 17 August 2005
7-Feb-2026 13:44 UT