Astronomical polarimetry is an essential observation method for deciphering the mysteries of magnetic properties in the universe. By analyzing the polarization of electromagnetic waves emitted or modified by celestial bodies, astronomers can obtain valuable information about the nature and dynamics of magnetic fields present in stars, interstellar matter, and other cosmic structures. This technique offers … Read more
Astronomy is on the brink of a revolutionary era where the challenges of extreme angular resolution find innovative answers. Space interferometry is currently the focus of all attention as it enables the acquisition of high-resolution images capable of detailing cosmic structures that are otherwise inaccessible. This advanced technique, which combines light from several collectors separated … Read more
In the ever-expanding universe, galactic halos stand out as fascinating structures enveloping our familiar galaxies. These vast spherical regions are primarily composed of dark matter, an invisible substance that cannot be directly detected but whose gravitational influence is crucial for understanding modern cosmology. The study of galactic halos allows us to decipher the large-scale organization … Read more
Galactic hydrogen filaments represent one of the fundamental components of cosmic structure, drawing a complex network that shapes the visible universe. These gigantic chains of baryonic matter, primarily composed of neutral hydrogen clouds, play a crucial role in the intergalactic medium by orchestrating galaxy formation and the evolution of galaxy clusters. Thanks to recent advances … Read more
In brief: Between diffuse matter and stellar explosions, interstellar bubbles trace the dynamics of a cosmos in perpetual change. These hollow nebulae, sometimes visible in X-rays or in the radio domain, emerge as witnesses of the winds projected by massive stars or debris from ancient supernovae. The complex interaction between these stellar winds and the … Read more
Stellar formation complexes represent one of the most fascinating and dynamic astrophysical phenomena in our universe. These vast cosmic regions house dense molecular clouds where stars are born, giving rise to star clusters and protostars. This process of gravitational collapse and formation is often accompanied by infrared emissions characterizing the protoplanetary disks where future planetary … Read more
In the night sky, the distribution of stars reveals a spectacle of unsuspected richness. Far from being distributed uniformly, young stars form particular groupings that fascinate modern astronomers as much as their distant predecessors. These stellar associations represent natural laboratories for understanding star formation and evolution, offering a direct window into the processes that govern … Read more
The Fermi paradox raises a fascinating question that has intrigued astronomers and scientists for decades: if the universe is so vast and ancient, why do we have no tangible evidence of extraterrestrial life or advanced civilizations? This apparent silence in the face of the multitude of possible habitable worlds poses a genuine scientific enigma. Enrico … Read more
Recent advances in astrobiology and space technology have propelled extraterrestrial research into new horizons. While traditional quests primarily relied on detecting radio signals, investigative frameworks are now expanding to technosignatures, the characteristic imprints left by advanced civilizations. These traces, whether they are electromagnetic signals, chemical emissions related to industrial activity, or artificial phenomena visible from … Read more
The Drake equation, formulated in 1961 by astronomer Frank Drake, remains an essential pillar in the field of astrophysics and astrobiology. This mathematical tool aims to quantify the number of potentially communicative advanced civilizations within our galaxy. From its inception, this sophisticated relationship has paved the way for a rigorous scientific approach to the search … Read more