Mission Objectives
ESA's PLATO spacecraft, scheduled for launch in 2027, will use the transit method to search for Earth‑size, rocky planets orbiting bright, nearby stars.
Defining the Venus Zone
The Venus Zone is the region around a star where a planet may either undergo a runaway greenhouse effect or lose its atmosphere because of intense stellar irradiation. Its outer edge marks the onset of a runaway greenhouse, while the inner edge corresponds to atmospheric escape driven by high flux.
Implications for Habitability Studies
By studying planets located in this zone, researchers hope to discern the factors that enable a stable, temperate climate like Earth’s, as opposed to the extreme greenhouse state seen on Venus. This comparative approach can clarify the evolutionary pathways that lead to sustained habitability.
Expected Outcomes
PLATO is expected to collect thousands of light curves, yielding candidate planets for follow‑up spectroscopy with ground‑based observatories and future space missions. The resulting data will refine climate‑evolution models and improve our understanding of how terrestrial worlds develop over time.