Extensions of fuzzy sets to broader contexts constitute one of the leading areas of research in the context of problems in artificial intelligence. Their aim is to address decision-making problems in the real world whenever obtaining accurate and sufficient data is not a straightforward task. In this way, spherical fuzzy sets were recently introduced as a step beyond to modelize such problems more precisely on the basis of the human nature, thus expanding the space of membership levels, which are defined under imprecise circumstances. The main goal in this study is to apply the spherical fuzzy set version of Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS), a well-established multicriteria decision-making approach, in the context of planetary defense. As of the extraction of knowledge from a group of experts in the field of near-Earth asteroids, they rated four deflection technologies of asteroids (kinetic impactor, ion beam deflection, enhanced gravity tractor, and laser ablation) that had been previously assessed by means of the classical theory of fuzzy series. This way, a comparative study was carried out whose most significant results are the kinetic impactor being the most suitable alternative and the spherical fuzzy set version of the TOPSIS approach behaves more sensitively than the TOPSIS procedure for triangular fuzzy sets with regard to the information provided by our group of experts.

M. Fernández-Martínez

J. M. Sánchez-Lozano

Advances in Astronomy

ADVANCES IN ASTRONOMY 在天文学、天体物理学和宇宙学的所有领域发表文章。该杂志接受对天体和更广阔的宇宙的观测和理论调查，以及关于他们研究的新方法和仪器的报告。

The journal "Advances in Astronomy" covers all areas of astronomy, astrophysics, and cosmology, publishing relevant research articles. It accepts observational and theoretical studies of celestial bodies and the broader universe, as well as reports on new methods and instruments related to their research.

《Advances in Astronomy》期刊涵盖天文学、天体物理学和宇宙学的各个领域，发表相关的研究文章。该杂志接受对天体及更广阔宇宙的观测和理论研究，以及关于新方法和仪器的报告。

Category	Quartile
物理与天体物理	4
物理与天体物理, 天文与天体物理	4

Assessment of Near-Earth Asteroid Deflection Techniques via Spherical Fuzzy Sets

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