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Euclid spacecraft grows as eyes meet brain
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By European Space Agency
Hera is complete. ESA’s asteroid mission for planetary defence was built and prepared in two halves, but now, through a painstaking operation, they have been mated together to make a single spacecraft, ready for full-scale testing of its readiness for space.
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By European Space Agency
Video: 00:04:46 During Artemis I the European Service Module (ESM) surpassed expectations. Now, as we set our sights on Artemis II, the European Service Module is ready to once again serve as Orion’s primary power and propulsion component and keep the spacecraft at the right temperature and on course. And this time, with real astronauts on board.
ESM-2 stands as a testament to ESA's contributions to NASA's Orion spacecraft and the Artemis programme, ensuring the crew will have the essentials – from electricity to temperature control – in the vastness of space.
Next up, ESM-2 will be connected with the crew module to create the Artemis II vehicle. It will then be tAhoroughly tested before launch scheduled for next year.
ESA is committed to send astronauts beyond low-Earth orbit and ultimately to the surface of the Moon and beyond. ESM is a key contribution to this joint international endeavour.
This video features interviews with: Philippe Berthe, ESA’s European Service Module Project Coordination manager
Kai Bergemann, Airbus deputy programme manager for Orion and the European Service Module
Jeremy Hansen, Canadian Space Agency Artemis II astronaut
Debbie Korth, NASA deputy programme manager for Orion
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By European Space Agency
Video: 00:03:31 ESA’s Euclid mission will create a 3D-map of the Universe that scientists will use to measure the properties of dark energy and dark matter and uncover the nature of these mysterious components. The map will contain a vast amount of data, it will cover more than a third of the sky and its third dimension will represent time spanning 10 billion years of cosmic history.
But dealing with the huge and detailed set of novel data that Euclid observations will produce is not an easy task. To prepare for this, scientists in the Euclid Consortium have developed one of the most accurate and comprehensive computer simulations of the large-scale structure of the Universe ever produced. They named this the Euclid Flagship simulation.
Running on large banks of advanced processors, computer simulations provide a unique laboratory to model the formation and evolution of large-scale structures in the Universe, such as galaxies, galaxy clusters, and the filamentary cosmic web they form. These state-of-the-art computational techniques allow astrophysicists to trace the motion and behavior of an extremely large number of dark-matter particles over cosmological volumes under the influence of their own gravitational pull. They replicate how and where galaxies form and grow, and are used to predict their distribution across the celestial sphere.
Explore the Euclid Flagship simulation in this video and get a sneak preview of the structure of the dark Universe, as we currently model it. New insights will be brought to you by the Euclid mission in the coming years.
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By European Space Agency
Euclid’s two instruments have captured their first test images. The mesmerising results indicate that the space telescope will achieve the scientific goals that it has been designed for – and possibly much more.
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By European Space Agency
Video: 00:01:47 In the month after its launch on 1 July, Euclid has travelled 1.5 million kilometres from Earth towards the Sun-Earth Lagrange point L2, meaning it has ‘arrived’ at its destination orbit.
This animation showcases the orbits of Euclid (green), the James Webb Space Telescope (blue), and the Gaia mission (yellow) around this unique position in space. The positions of the spacecraft in this animation don’t correspond to their current positions in space.
Located about 1.5 million kilometres from Earth in the opposite direction from the Sun, L2 is about four times further away than our Moon. Several other space missions like Webb and Gaia also orbit L2 as it offers the perfect vantage point to study the Universe.
At L2, the spacecraft can keep the Sun, Earth and Moon behind them at all times, so they don’t interfere with observations, while at the same time getting a clear view of deep space and pointing an antenna back to Earth to remain in close communication.
Euclid and Webb’s halo orbit around L2 is big. In terms of distance, the ‘radius’ of Euclid’s orbit varies from about 400 000 kilometres at its closest to the centre, and up to 800 000 kilometres at its furthest. By the time Euclid has completed one full revolution around L2, the Moon will have circled the Earth six times. Gaia orbits L2 in a Lissajous orbit, with a maximum distance of around 350 000 km from its centre.
The region around L2 is big and even though the orbits of these spacecraft seem to cross in the animation, in reality there is plenty of space and a collision can be easily avoided. For example, Webb and Gaia are between 400 000 and 1 100 000 km apart, depending on where they are in their respective orbits.
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