European Space Agency

Alignment of the James Webb Space Telescope is now complete. After full review, the observatory has been confirmed to be capable of capturing crisp, well-focused images with each of its four powerful onboard science instruments. Upon completing the seventh and final stage of telescope alignment, the team held a set of key decision meetings and unanimously agreed […]

Archival observations of 25 hot Jupiters by the NASA/ESA Hubble Space Telescope have been analysed by an international team of astronomers, enabling them to answer five open questions important to our understanding of exoplanet atmospheres. Amongst other findings, the team found that the presence of metal oxides and hydrides in the hottest exoplanet atmospheres was […]

After decades of drought, water levels in Lake Powell, the second-largest humanmade reservoir in the United States, have shrunk to its lowest level since it was created more than 50 years ago, threatening millions of people who rely on its water supply. Satellite images allow us to take a closer look at the dwindling water […]

As an intergovernmental organization mandated to develop and implement space programs in full respect with European values, we deeply deplore the human casualties and tragic consequences of the aggression towards Ukraine. While recognizing the impact on scientific exploration of space, ESA is fully aligned with the sanctions imposed on Russia by its Member States. ExoMars […]

Most asteroids that have impacted Earth were discovered many years, often many millions of years, after the event. The evidence? Roughly 200 known craters scar Earth’s surface, telling an impactful story of how our planet, and life on it, has been dramatically shaped by violent collisions with ancient space rocks. On occasion – five in […]

Sea-level rise is arguably one of the most serious consequences of the climate crisis. While using satellite data to monitor how the height of the sea is changing provides critical evidence for decision-making, satellites are also essential to measuring the individual components, such as seawater temperature and glacier melt, that contribute to the overall rise. […]

The Hunga-Tonga-Hunga-Ha’apai volcano near Tonga in the South Pacific erupted with such force on 15 January that it is thought to be the biggest eruption recorded anywhere on the planet in 30 years. Sending tsunami waves across the Pacific, the effects of this underwater eruption were felt as far away as the United States and […]

A pretty special gift unwrapping will soon take place – a piercing tool built by ESA will open a Moon soil container from Apollo 17 that has gone untouched for nearly 50 years. The opening will allow the extraction of precious lunar gases which may have been preserved in the sample. Analysis of the gaseous […]

Solar Orbiter is returning to Earth for a flyby before starting its main science mission to explore the Sun and its connection to ‘space weather’. During the flyby Solar Orbiter must pass through the clouds of space debris that surround our planet, making this manoeuvre the riskiest flyby yet for a science mission. Navigating risk […]

November 2, 2021 – Satellites play a vital role in monitoring the rapid changes taking place in the Arctic. Tracking ice lost from the world’s glaciers, ice sheets and frozen land shows that Earth is losing ice at an accelerating rate. Currently more than a trillion tones of ice is lost each year. The sooner […]

Using ESA’s XMM-Newton and NASA’s Chandra X-ray space telescopes, astronomers have made an important step in the quest to find a planet outside of the Milky Way. Spotting a planet in another galaxy is hard, and even though astronomers know that they should exist, no planetary systems outside of the Milky Way have been confirmed […]

When considering the implications of thawing permafrost, our initial worries are likely to turn to the major issue of methane being released into the atmosphere and exacerbating global warming or issues for local communities as the ground and infrastructure become unstable. While this is bad enough, new research reveals that the potential effects of permafrost […]

After the Sun ejected a violent mass of fast-moving plasma into space on 9 October, ESA waited for the storm to strike. A few days later, the coronal mass ejection (CME) arrived at Earth, crashing into our planet’s magnetosphere, and lighting up the sky. CMEs explode from the Sun, rush through the Solar System and […]

Tonight, BepiColombo will perform the first of six Mercury flybys, each honing the spacecrafts’ trajectory with the ultimate goal of shedding enough energy – after its two years ‘falling’ towards the Sun – to be caught by the innermost planet’s gravity and remain in Mercurial orbit. This first Mercury flyby will alter the spacecraft’s velocity by 2.1 km/s […]

This image, captured by the Copernicus Sentinel-2 mission on 30 September, shows the flow of lava from the volcano erupting on the Spanish island of La Palma. The cascade of lava can be seen spilling into the Atlantic Ocean, extending the size of the coastline. This ‘lava delta’ covered about 20 hectares when the image was taken. […]