Category: Science

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On 9 December 2024, the Smile Platform arrived safely at Amsterdam Schiphol airport and was subsequently transported to ESA’s European Space Research and Technology Centre (ESTEC) in Noordwijk, the Netherlands. It came a long way, having travelled all the way from Shanghai, China.  

This marks an important step in the Smile mission, as the spacecraft’s two halves are now in the same location, ready to be joined together. Launching in around a year from now, Smile will study space weather and the interaction between the solar wind and Earth’s environment. 

The Platform, built by the Chinese Academy of Sciences (CAS), includes the propulsion and service modules responsible for powering, steering and controlling the spacecraft. The European half of the spacecraft –  the so-called Payload Module – was built by Airbus in Madrid and is already at ESTEC. It hosts three of the four science instruments of the mission, commands all four of them and downlinks all the data back to Earth. 

The Platform didn’t travel alone. It was accompanied by a team of Smile engineers and managers from CAS. They will closely work together with their European counterparts from ESA and Airbus during the coming ten months to assemble the Smile spacecraft and fully test it at ESA’s ESTEC Test Centre. 

After that, Smile will be shipped to Europe’s Spaceport in Kourou, French Guiana. Its launch is planned for late 2025. 

All Let’s Smile videos will be listed here: Let’s Smile

On 1 December 2024, BepiColombo flew past Mercury for the fifth time. During this flyby, BepiColombo became the first spacecraft ever to observe Mercury in mid-infrared light. The new images reveal variations in temperature and composition across the planet’s cratered surface.

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Bepi, Mio and MTM greet Mercury for the fifth time

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Webb traces spiral arms in infrared

Zoom into Solar Orbiter’s four new Sun images, assembled from high-resolution observations by the spacecraft’s PHI and EUI instruments made on 22 March 2023. The PHI images are the highest-resolution full views of the Sun’s visible surface to date, including maps of the Sun’s messy magnetic field and movement on the surface. These can be compared to the new EUI image, which reveals the Sun’s glowing outer atmosphere, or corona.

On 12 November 2014, after a ten year journey through the Solar System and over 500 million kilometres from home, Rosetta’s lander Philae made space exploration history by touching down on a comet for the first time. On the occasion of the tenth anniversary of this extraordinary feat, we celebrate Philae’s impressive achievements at Comet 67P/Churyumov-Gerasimenko.

The Sun follows a roughly 11-year rhythm of waking up and becoming very active before calming down again, a stellar beat known as the solar cycle. This affects Earth because it shapes space weather, determining how much radiation, magnetic field and particles the Sun flings out into space and towards our planet. 

The NASA/ESA Hubble Space Telescope has provided a dramatic and colourful close-up look at one of the most boisterous stars in our galaxy, weaving a huge spiral pattern among the stars. Hubble’s images capturing its details and its evolution are featured by a unique timelapse video.

What’s better than one spacecraft on the quest to search for life-friendly ocean worlds in the Jupiter system? Two! ESA’s Jupiter Icy Moons Explorer (Juice) is set to join forces with NASA’s Europa Clipper – launched on 14 October – to tackle one of the biggest questions in Solar System science.

In a surprise finding, astronomers using the NASA/ESA Hubble Space Telescope have discovered that the blowtorch-like jet from a supermassive black hole at the core of a huge galaxy seems to cause stars to erupt along its trajectory. The stars, called novae, are not caught inside the jet, but apparently in a dangerous neighbourhood nearby.

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Webb’s new view of Arp 107

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See Mercury in a whole new light, through the ‘eyes’ of the ESA/JAXA BepiColombo spacecraft, as it sped past Mercury during its latest encounter on 4 September 2024.

During the flyby, BepiColombo’s three monitoring cameras (M-CAMs) captured detailed images of the planet’s cratered surface. Within these images, Mercury scientists identified various geological features that BepiColombo will study in more detail once in orbit around the planet.

One such feature, shown in this video, is the newly named Stoddart crater. The name ‘Stoddart’ – after artist Margaret Olrog Stoddart (1865–1934) – was recently assigned following a request from the M-CAM team, who realised that this crater would be visible in these images and decided it would be worth naming considering its potential interest for scientists in the future.

Stoddart is a special type of crater called a ‘peak ring basin’. These mysterious craters are created by powerful asteroid or comet impacts, and are named after the inner ring of peaks on an otherwise flattish floor.

The video then pans around to the larger Raphael crater. Many newer craters dot the surface and walls of Raphel, giving an indication of Mercury’s violent history.

At the end of the video the camera zooms out to put the region into perspective.

The 3D scene was reconstructed from a single image using the ‘Shape from Shading’ method. Shape from Shading uses a reflectance model to render an artificial image of the surface from an initial 3D model. This render is compared to the original image, and the 3D model is subsequently improved to minimise the difference between the images. The heights in the video are not to scale. The flyover was created in Unity.

The 4 September gravity assist flyby was the fourth at Mercury and the seventh of nine planetary flybys overall. During its eight-year cruise to the smallest and innermost planet of the Solar System, BepiColombo makes one flyby at Earth, two at Venus and six at Mercury, to help steer itself on course for entering orbit around Mercury in 2026.

BepiColombo is an international collaboration between ESA and JAXA.

BepiColombo’s best images yet highlight fourth Mercury flyby

BepiColombo images in ESA’s Planetary Science Archive

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ESA’s Euclid mission is surveying the sky to explore the composition and evolution of the dark Universe. But how can Euclid see the invisible? Watch this video to learn about the light-bending effect that enables scientists to trace how dark matter is distributed in the Universe.

By making use of Euclid’s flagship simulation, the video illustrates how dark-matter filaments subtly alter the shape of galaxies. Light travelling to us from vastly distant galaxies is bent and distorted by concentrations of matter along its way. The effect is called gravitational lensing because matter (both ‘normal’ and dark matter) acts as a kind of magnifying glass.

Scientists distinguish between strong and weak gravitational lensing. In strong gravitational lensing distortions of background galaxies or other light sources are very apparent, resulting in arcs, multiple images or so-called Einstein rings. In weak lensing, background sources appear only mildly stretched or displaced. This means we can only detect this effect by analysing large numbers of sources in a statistical way.

The further we look, the more prominent the distortions from weak gravitational lensing are, because there are more dark-matter structures acting as lenses between us and the light sources.

Euclid will measure the distorted shapes of billions of galaxies over 10 billion years of cosmic history, providing a 3D view of the dark matter distribution in our Universe. This will shed light on the nature of this mysterious component.

The map of the distribution of galaxies over cosmic time will also teach us about dark energy, which affects how quickly the Universe expands. By charting the Universe’s large-scale structure in unprecedented detail, Euclid will enable scientists to trace how the expansion has changed over time.