Will we ever find another habitable planet similar to Earth? If any are out there, we might need an interferometer to find them.
, and others have advanced exoplanet science considerably, but the holy grail in exoplanet research is finding another habitable world similar to Earth. So far, no luck. The authors of this study think they can make progress toward the ultimate goal in exoplanet research: ‘another Earth.’
This image was taken during a time-lapse set at the Atacama Large Millimeter/submillimeter Array ALMA is probably the most well-known astronomical interferometer. An interferometer works by capturing images and data from multiple dishes or telescopes in different positions. The images are then combined into a single image with much higher resolution, and sensitivity than would be obtained from a single dish or telescope. Image Credit: ESO/ALMA.
The James Webb Telescope had to be folded up to fit into its rocket, then unfolded in space. That type of complexity is expensive and risky. An interferometer made of multiple small telescopes avoids this type of complexity. Credits: NASA/Chris Gunn The proposed interferometer has a clear objective: to search for and characterize habitable exoplanets in our solar system’s neighbours within 65 light-years. To do that, the study outlines four requirements:
High sensitivity. The planet’s brightness in the signal dominant band is less than three photons/sec/mWide spectral range. Indirect observation in the near-infrared band of 1 to 5 ?m and direct observation in the near-infrared band of 1 to 13 ?m.
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