Event Horizon Telescope reveals why M87’s black hole ring is not a perfect circle

The galaxy M87, located about 55 million light-years from Earth, hosts at its core the supermassive black hole M87*, whose image whose image went viral around the globe in 2019 thanks to the Event Horizon Telescope (EHT). That historic photograph revealed a luminous ring around M87* with a slightly elongated shape that raised many questions: why is it not perfectly circular? Today, the journal Astronomy & Astrophysics (A&A) publishes a study co-led by the Instituto de Astrofísica de Andalucía (IAA-CSIC) that sheds light on the issue.

The DUSTER project successfully passes final review and makes progress on lunar dust control

As missions prepare to return to the Moon, one of the major challenges facing space exploration is lunar dust. These tiny, electrically charged particles pose risks both to human health and to the performance of instruments and equipment on the lunar surface.

ESA's PLATO space telescope completes key phase in its search for exoplanets

Are there planets like Earth? Do they orbit stars similar to the Sun? How do planetary systems form and evolve? To address these and other fundamental questions, the European Space Agency (ESA) will launch the PLATO 2.0 mission (PLAnetary Transits and Oscillations of stars) in late 2026. Starting in 2027, PLATO will begin its exploration of planets beyond our Solar System, with a special focus on Earth-sized worlds orbiting Sun-like stars.

A cosmic signal from the early universe could reveal what the first stars were like

Understanding how the universe transitioned from darkness to light with the formation of the first stars and galaxies marks a turning point in cosmic evolution, known as the Cosmic Dawn. However, even the most powerful telescopes cannot observe these first stars directly, making it one of the greatest challenges in astronomy to determine their properties.

New clues to understanding the loss of the water Mars hosted billions of years ago

Mars is now an extremely arid planet, with pressure and temperature conditions that prevent liquid water from existing on its surface. However, geological and mineralogical evidence points to the presence of large volumes of water in the distant past, in the form of rivers, lakes, and even oceans. Despite decades of research, one of the biggest mysteries in Mars’ history remains unsolved: what happened to all that water?

First images of the Sun’s poles: a major milestone in solar exploration

 The Solar Orbiter mission, developed by the European Space Agency (ESA), has captured the first-ever images of the Sun’s south pole, released this Wednesday and marking a milestone in solar exploration.

Until now, all known images of our star had been taken from the plane of the ecliptic—that is, from a perspective aligned with Earth’s orbit around the Sun. Thanks to Solar Orbiter—a space probe launched five years ago with the goal of offering an unprecedented view of the Sun—our star has now been observed for the first time from outside this plane.

Not all active galaxies are the same: infrared observations reveal two distinct families

Active galactic nuclei (AGN) are areas at the centre of certain galaxies where a supermassive black hole releases an enormous amount of energy by sucking in the matter around it. These nuclei can influence the evolution of entire galaxies through their ability to drag in chemical elements and generate powerful winds that affect the galactic environment. In addition, these objects are localised and hidden behind dense dust clouds, which makes it difficult to study them directly.