Space telescopes play an essential role in exploring the Universe. Placed above Earth's atmosphere, they escape the turbulence, optical distortions, and absorptions that limit ground-based observations. This privileged position allows them to obtain images of a sharpness and precision inaccessible to terrestrial instruments.
Space probes, artificial satellites, and orbital telescopes form a set of complementary instruments. Probes travel to planets, comets, or asteroids to analyze their composition and structure. Observation satellites scan Earth or monitor solar activity, while space telescopes observe the Universe across all wavelengths, from gamma rays to radio waves.
Thanks to these instruments, astronomy has undergone a profound transformation. They have revealed distant galaxies, spectacular nebulae, exoplanets, and phenomena invisible from Earth's surface. Their contribution continues to expand our understanding of the cosmos and open new perspectives on the evolution of the Universe.
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How to Spot Starlink Satellite Trains in the Sky? 
AI, the Astronomer's New Eye: From Analysis to Cosmic Prediction 
What the First Images from Perseverance Show Us: The Surface of Mars, As If We Were There 
GRAIL Twin Probes: Mapping the Moon's Hidden Interior 
Earth Under Surveillance: Observation Satellites 
March 2010: The Ring of Fire Captured by the SDO Observatory 
Positions of Space Probes in 2025 
Giants of Observation: The Largest Ground-Based Telescopes 
Low Earth Orbits and their uses 
Pioneer, first message to extraterrestrials ! 
How to see infrared images from JWST? 
Sputnik 1 and 2: The Dawn of the Space Age 
ENVISAT: Ten Years of Uninterrupted Observation of Earth's Ecosystems 
Lagrange Points: Gravitational Gateways of the Solar System 
Mars Reconnaissance Orbiter: The Lynx Eye Revealing Martian Secrets 
Kepler: 4,000 Worlds and More, A New Map of the Sky 
Why Measure Space at the Nanometer Level? 
High-risk landing for Curiosity in 2012 
Cheops Space Telescope: A New Vision on Exoplanets 
The world of Planck 
Rosetta Space Probe: Comet Churyumov-Gerasimenko 
The Hubble Space Telescope: Three Decades of Revelations 
Première photo du télescope Hubble 
Satellites that measure underwater relief 
MESSENGER: The First Probe to Visit the Mysterious Planet 
How GPS Locates Your Position at Any Time? 
The ISS and Beyond? Towards the End of a Space Chapter 
Space Telescopes: Humanity's Eye Beyond the Atmosphere 
Space Probes: Interplanetary Travelers and Beyond
The GAIA satellite maps the Milky Way 
How to calculate the synchronous orbit? 
E-ELT: The World's Largest Optical Telescope 
Mercury probes 
Space Debris: The Nightmare of Modern Satellites 
Aquarius: A Mission to Map Ocean Salinity 
JWST: An Unprecedented Look at the First Lights of the Universe 
METEOSAT: A Key Satellite for Climate Monitoring 
Curiosity, the first shovel, sample of Martian soil 
From Mariner to Perseverance: Successes and Failures of Mars Probes 
Where is the geostationary orbit? 
MOM, the technological demonstration 
Venus under surveillance: an overview of space probes 
What Is an Astronomical Interferometer?
The Philae Robot and the Rosetta Comet 
Mauna Kea Under the Stars: The CFHT Telescope in Pursuit of the Universe's Mysteries