The mission will launch on July 1.
“Euclid has the resolving power of the Hubble space telescope but will be able to survey a third of the night sky at the same time, so it will give us an incredibly detailed map of the heavens,” the astronomer Stephen Wilkins, of Sussex University, toldSince dark matter cannot be seen directly, Euclid will exploit a phenomenon known as gravitational lensing by taking millions of images of galaxies that showcase light passing through them and their gravitational field stretching.
“Gravitational lensing produced by dark matter will tell us a great deal about what it is made of,” said Prof Mathilde Jouzac of Durham University. “It may be that dark matter is made up of light particles. If so, they will produce one kind of lensing. On the other hand, if dark matter is made of very large particles, that will produce a different set of lensing. This information will then help direct the search for dark matter particles on Earth.
The scientists hope the tool will be able to trace back how the universe has expanded over the past 10 billion years. “The point of Euclid is really to get the data that will allow us to start discriminating between which of the different ideas we have about the dark universe,”
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