What physical characteristic of Venus is similar to Earth?

The physical characteristic of Venus that is most similar to Earth is its nearly the same size. Venus and Earth are often referred to as "sister planets" because they have a comparable diameter, mass, and volume. Venus's diameter is about 12,104 kilometers, while Earth's is about 12,742 kilometers, making their sizes relatively similar within a close range. This similarity has implications for a range of scientific studies, including those relating to planetary geology and atmospheric research.

In contrast, the other characteristics listed denote significant differences between the two planets. For instance, while Venus is similar in size to Earth, it is not significantly larger or smaller. Additionally, Venus has a solid surface, unlike gas giants, and while its atmosphere is dense and prevents sunlight from reaching the surface, it does not mean it lacks a solid foundation. Therefore, the nearly the same size of Venus compared to Earth highlights an important aspect of their physical characteristics that is often studied in planetary science.