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UK Space Agency: Scientists are a step closer to finding planets like Earth
A UK-backed mission that will search for Earth-like planets has been given the green light to continue development after passing a critical milestone review.
The UK Space Agency has invested £25 million in innovative science for the European Space Agency mission, called Planetary Transits and Oscillations of stars (PLATO), ensuring UK scientists and engineers, led by the University of Warwick, will take part in all aspects of the mission.
Caroline Harper, Head of Space Science at the UK Space Agency, recently said:
The critical milestone review has confirmed the maturity of the design and the robustness of the build schedule for both the science instruments and the spacecraft they will fly on, so it is now full speed ahead for PLATO.
The mission offers the exciting potential for a rocky planet with life signatures to be detected using innovative sensors, electronics and software developed in the UK, on a mission with UK science leadership.
Planned to launch in 2026, the next-generation planet hunting mission will monitor thousands of relatively bright stars over a large area of the sky, searching for tiny, regular dips in brightness as their planets transit in front of them, temporarily blocking out a small fraction of the starlight. The analysis of these transits and of the variations in the starlight will allow us to characterise the properties of the exoplanets and their host stars.
Astronomers have so far found over 3,000 planets beyond our Solar System which are called exoplanets, but none, as yet, has been shown to be truly Earth-like in terms of its size and distance from a Sun similar to our own. PLATO’s innovative design is set to change all that.
Its suite of 26 small telescopes and cameras, reminiscent of the compound eye of an insect, will allow it to ‘stare’ at a large number of the nearest and brightest stars, with the aim of discovering Earth-sized planets orbiting Sun-like stars in the ‘habitable zone’ – the distance from the star where liquid water could exist at the surface.
PLATO optical bench entering the Large Space Simulator (ESTEC) for the thermos-elastic deformation test (TED) in September 2021. Credit: ESA
Professor Don Pollacco, from the University of Warwick, which leads the PLATO Science Management Consortium, recently said:
The PLATO project involves the serial production of complicated components and is challenging to both academia and industry. The Critical Milestone is a detailed examination of how these processes will work in practice.
Any production errors will lead to greater costs and delays so passing this milestone is reaffirming confidence in the hundreds of scientists and engineers that are working on this mission. Our dream of finding lots of planets like the Earth that we can examine in detail is one step closer.
The UK has a major role in many aspects of the mission. In addition to Warwick’s involvement, scientists and engineers at UCL’s Mullard Space Science Laboratory are responsible for the development of the camera electronics for the telescopes. The detectors are produced by Teledyne e2v in Chelmsford, and a team of UK scientists coordinated by Cambridge University’s Institute of Astronomy is developing the Exoplanet Analysis data processing system.
Filippo Marliani, project manager of PLATO at ESA, recently said:
Plato continues a European tradition of excellence in all areas of space science. The mission will serve the science community to gather invaluable knowledge of planets in our galaxy, beyond our own Solar System.
The successful completion of the critical milestone and the formal start of the second phase of this extraordinary mission constitute an important boost of positive energy for the next challenges to be tackled with our industrial, institutional and academic partners.
The next major milestone for PLATO is the spacecraft critical design review in 2023, which will verify the detailed design of the complete spacecraft before proceeding with its assembly. After launch, PLATO will travel to Lagrange point 2 in space, 1.5 million km beyond Earth in the direction away from the Sun. From this point the telescope will observe more than 200 000 stars during its four-year nominal mission
The government’s National Space Strategy outlines the long-term plans to grow the UK space sector and make Britain a science and technology superpower, expanding our horizons with space science and exploration missions like PLATO.
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