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PLAnetary Transits and Oscillations of stars
Theme What are the conditions for planet formation and the emergence of life?
Primary Goal Detection and characterisation of terrestrial exoplanets around bright solar-type stars, with emphasis on planets orbiting in the habitable zone.
  • Photometric monitoring of a large number of bright stars for the detection of planetary transits and the determination of the planetary radii (around 3% accuracy)
  • Ground-based radial velocity follow-up observations for the determination of the planetary masses (around 10% accuracy)
  • Asteroseismology for the determination of stellar masses, radii, and ages (up to 10% of the main sequence lifetime)
  • Identification of bright targets for spectroscopic follow-up observations of planetary atmospheres with other ground and space facilities
Wavelength Optical
Telescope A number of small, optically fast, wide-field telescopes
Orbit Large amplitude libration orbit around Sun-Earth Lagrangian point, L2
Lifetime 4 years of nominal science operations; satellite built and verified for an in-orbit lifetime of 6.5 years, accommodating consumables for 8.5 years
Type M-class Mission


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Last Update: 28 November 2019
26-Oct-2020 03:43 UT

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