M2 – Euclid

The European Space Agency's (ESA) M2 mission, Euclid, is a space telescope designed to study the dark universe, including dark matter and dark energy. The mission is set to launch in 2022 and will provide unprecedented insights into the nature of the universe and its evolution.

When:

The Euclid mission was first proposed in 2007 and was selected as part of the ESA's Cosmic Vision program in 2011. The development phase of the mission began in 2013, and the launch was originally scheduled for 2020. However, delays in the construction and testing of the spacecraft pushed the launch back to 2022.

Why:

The Euclid mission aims to address some of the most pressing questions in astrophysics, including the nature of dark energy and dark matter. Dark energy is a hypothetical form of energy that is thought to be responsible for the accelerating expansion of the universe. Dark matter, on the other hand, is a mysterious substance that makes up the majority of the matter in the universe but cannot be directly observed. Euclid will study the distribution of dark matter and dark energy throughout the universe, providing new insights into their properties.

In addition to studying dark energy and dark matter, Euclid will also investigate the formation and evolution of galaxies. The mission will use a combination of visible and near-infrared observations to map the distribution of galaxies throughout the universe and measure their properties, such as their size, shape, and brightness.

How:

The Euclid spacecraft is being developed by a consortium of ESA member states, led by France and Italy. The mission is being built by Thales Alenia Space, with scientific instruments provided by a consortium of European research institutions.

The spacecraft is designed to operate in a halo orbit around the second Lagrange point (L2), which is located about 1.5 million kilometers from Earth. From this vantage point, Euclid will have an unobstructed view of the cosmos and will be able to observe large areas of the sky without interference from Earth's atmosphere.

Euclid will carry two scientific instruments: a visible light camera and a near-infrared camera/spectrometer. The visible light camera will be used to map the distribution of galaxies, while the near-infrared camera/spectrometer will be used to measure their properties and study the effects of dark energy and dark matter.

The mission will also use a technique called gravitational lensing, which occurs when the gravity of a massive object, such as a galaxy cluster, bends and distorts the light from more distant objects. By measuring the distortions in the light, Euclid will be able to map the distribution of dark matter throughout the universe.

Cost:

The cost of the Euclid mission is estimated to be around €830 million ($1 billion USD). This includes the development, construction, launch, and operations of the spacecraft. The mission is being funded by the ESA member states, with contributions from Canada, the United States, and Israel.

Achievements:

The Euclid mission is expected to make a number of groundbreaking discoveries in the field of astrophysics. Some of the key achievements that the mission is expected to deliver include:

* Mapping the distribution of dark matter and dark energy throughout the universe, providing new insights into their properties and how they interact with matter.

* Measuring the expansion rate of the universe with unprecedented accuracy, helping to determine the ultimate fate of the universe.

* Studying the formation and evolution of galaxies, including their size, shape, and brightness.

* Discovering new objects in the universe, such as asteroids, comets, and distant galaxies.

* Testing the validity of Einstein's theory of general relativity and other theories of gravity.

In addition to these scientific achievements, the Euclid mission is also expected to have a number of technological and practical benefits. The development of the mission has required the collaboration of scientists and engineers from across Europe and beyond, leading to advances in areas such as data analysis, space technology, and optics. The mission will also provide valuable data for other scientific fields, such as cosmology, particle physics, and astronomy. Furthermore, the insights gained from the Euclid mission could have practical applications in areas such as energy production and storage, materials science, and advanced computing. Overall, the Euclid mission represents a major investment in the advancement of human knowledge and the exploration of the universe.