Teaching cosmology at the undergraduate or high school level requires simplifications and analogies, and inevitably brings the teacher into contact with at least one of the pedagogical interpretations of the expanding universe. The by far most popular interpretation holds that galaxies in an expanding universe are stationary, while space itself expands and thus causes the growing distances that characterize cosmic expansion. The alternative relativistic explosion interpretation regards cosmic expansion as a pattern of (relativistic) galaxy motion. The aim of this article is to discuss the two competing interpretations from the perspective of potential student preconceptions, taking into account both beneficial anchoring conceptions and potentially harmful preconceptions that can lead to misconceptions.

中文翻译：

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宇宙膨胀的解释：锚定概念和误解

在本科或高中阶段教授宇宙学需要简化和类比，并且不可避免地使教师接触到至少一种对膨胀宇宙的教学解释。迄今为止最流行的解释认为，膨胀宇宙中的星系是静止的，而空间本身会膨胀，从而导致宇宙膨胀特征的距离越来越大。另一种相对论爆炸解释将宇宙膨胀视为（相对论）星系运动的一种模式。本文的目的是从潜在的学生成见的角度讨论两种相互竞争的解释，同时考虑到有益的锚定概念和可能导致误解的潜在有害成见。