#Y2025 #天文光学 Update date: 2025-09-21 美国伦斯勒理工学院海蒂·纽伯格教授团队正在设计这样一个望远镜，准备用它来寻找30光年内地球的系外行星“双胞胎”，并由信心在短短3.5年内找到27个“地球2.0”。这项研究刚刚发表在9月1日《天文学与空间科学前沿》杂志上。论文的设想是建造一个主镜为20米长、1米宽的矩形太空望远镜。（韦伯望远镜口径是6.5米） 论文摘要： We suggest that rectangular primary-mirror telescopes provide a clearer path to discovering habitable worlds than other designs currently being pursued. We show that a simple infrared (λ∼10 μm) telescope design with a rectangular mirror 20 m in length and 1 m in width, combined with technology already developed for JWST, can discover ∼11 habitable exoplanets and measure ozone in their atmospheres in a mission of ∼1 year. A mission of ∼3.5 years could plausibly discover ∼27 habitable exoplanets closer than 10 pc to the Earth, and determine whether there is ozone in their atmospheres. A square primary mirror with the same collecting area cannot resolve exoplanets that are within 0.23″ of the host star, making it impossible to detect most of the nearby Earth-like exoplanets. The idea of collecting light with a high aspect ratio rectangular mirror could be used at any wavelength. It is particularly useful for measuring point sources with very small angular separations, as is required for exoplanet observation.  --- 版权声明: 感谢您的阅读，本文由[超光](https://faster-than-light.net/)版权所有。如若转载，请注明出处。