The present rate of the expansion of our Universe, the Hubble constant, can be predicted from the cosmological model using measurements of the early Universe, or more directly measured from the late Universe. But as these measurements improved, a surprising disagreement between the two appeared. In 2019, a number of independent measurements of the late Universe using different methods and data provided consistent results, making the discrepancy with the early Universe predictions increasingly hard to ignore. The Hubble constant can be estimated from measurements of both the early and late Universe, but the two estimates disagree. In 2019 a number of independent measurements using different methods made this discrepancy harder to ignore.

中文翻译：

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宇宙的膨胀比预期的快

我们宇宙的当前膨胀率，即哈勃常数，可以使用早期宇宙的测量结果从宇宙学模型中进行预测，或者更直接地从宇宙晚期的测量结果中进行预测。但是随着这些测量方法的改进，两者之间出现了令人惊讶的分歧。在2019年，使用不同的方法和数据对宇宙晚期进行的多次独立测量提供了一致的结果，这使得与早期宇宙预测的差异越来越难以忽视。哈勃常数可以通过对早期宇宙和晚期宇宙的测量来估计，但是这两个估计不一致。在2019年，使用不同方法进行的多次独立测量使这一差异更难以忽视。