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Exoplanet imaging using the solar gravitational lens is an enticing prospect.The fundamental physical properties of the lens, including its angularresolution and light amplification, promise exceptional capabilities. Theseexpectations, however, are tempered by the realization of numerous challenges,including imperfections of the lens itself, noise sources, the properties ofthe imaging target and difficult technical issues. We discuss, in particular, asubject not previously addressed, the impact of temporally varying surfacefeatures, notably a variable cloud cover, obscuring the target exoplanet. Thishas a substantial detrimental effect on image recovery, leading to our cautiousassessment of the practical feasibility of using the Sun's gravitational fieldas an effective telescope.

Peeking under the clouds: Is exoplanet imaging with the solar gravitational lens feasible?