Euclid spacecraft prepares to probe universe’s dark mysteries

For now, Europe’s Euclid spacecraft sits quietly in a sterilized room within the south of France, its golden trim gleaming below the fluorescent mild.

However in a number of months the space telescope will blast off on historical past’s first mission to seek for two of the universe’s best mysteries: dark matter and dark energy.

Although collectively they make up 95 % of the universe, virtually nothing is thought about both—a evident gap in scientific understanding that Euclid mission supervisor Giuseppe Racca dubbed a “cosmic embarrassment”.

Aiming to make clear these darkish secrets and techniques, the European House Company’s mission will chart a 3D map of the universe encompassing two billion galaxies throughout greater than a 3rd of the sky.

The third dimension of this map shall be time—as a result of Euclid’s gaze will stretch out to 10 billion light years away, it’ll supply new perception into how the 13.8-billion-year-old universe advanced.

The 2-ton spacecraft, which is 4.7 meters (15 ft) tall and three.5 meters (11 ft) large, was unveiled to the media for the primary time this week in a clear room of the Thales Alenia House firm within the southeastern French metropolis of Cannes.

Only some remaining checks stay earlier than it heads to Cape Canaveral in the US for a launch scheduled between July 1 and 30 on a SpaceX Falcon 9 rocket.

Euclid was initially deliberate to get a trip into space on a Russian Soyuz rocket, however final yr Moscow withdrew its launchers in response to European sanctions over its invasion of Ukraine, delaying the launch.

Taking a wider view

Euclid will be part of fellow space telescope James Webb at a steady hovering spot round 1.5 million kilometers from Earth referred to as the second Lagrangian Level, the place it may preserve its solar panel-covered again completely to the Solar.

The primary pictures are anticipated to roll in shortly as soon as scientific operations begin in October, however for bigger discoveries it’ll probably take scientists months or years to sift by way of the “unprecedented quantity of information”, Racca stated.

The 1.4-billion-euro ($1.5 billion) European mission is deliberate to final till 2029, although “if nothing unusual occurs” it may very well be prolonged a pair extra years, Racca informed a press convention.

How will Euclid, which is called after the traditional Greek founding father of the sector of geometry, observe one thing that can not be seen? By trying to find its absence.

The sunshine coming from billions of years previously is barely distorted by the mass of seen and dark matter alongside the way in which, a phenomenon referred to as weak gravitational lensing.

“By subtracting the seen matter, we are able to calculate the presence of the dark matter which is in between,” Racca stated.

To do that, Euclid has two important devices, a 1.2-meter (four-foot) diameter telescope and the Close to Infrared Spectrometer and Photometer (NISP), which may cut up infrared wavelengths not seen to the attention.

‘Distinctive device’

Partly what units Euclid other than different space telescopes is its discipline of view, which takes in an space equal to “two full moons”, stated David Elbaz, an astrophysicist on the French Atomic Vitality Fee.

This large view will allow Euclid to find large constructions like black holes that the Webb telescope can’t hope to seek out as a result of its “discipline of view is simply too small”, Euclid’s mission scientist Rene Laureijs informed AFP.

However Euclid’s universe-spanning survey will be capable to level Webb in the appropriate course for nearer inspection, stated Laureijs, who has been engaged on the mission because the proposal stage in 2007.

The mission comes amid rising indicators that there are some severe inconsistencies in our understanding of how the universe works.

Two very precise measurements give two considerably totally different solutions for the speed at which the universe is increasing—an issue referred to as the Hubble rigidity by which darkish power is assumed to play a serious position.

And simply this week, the Webb telescope noticed six galaxies within the early universe that seemingly defy cosmological idea as a result of they’re far too large to have shaped so shortly after the Massive Bang.

Euclid shall be a “distinctive device” within the quest to seek out solutions to such questions, Elbaz stated.

© 2023 AFP