Which of the following statements is true?

Question

BlackTom AI · Accepted Answer

Question restatement: Which of the following statements is true?
Options: 
1) Everything in the universe is moving away from everything else
2) There is no central point in the universe
3) The universe has no beginning and no end
4) We are the centre of the universe and everything is moving away from us

Option 1 analysis: Saying that Everything in the universe is moving away from everything else is an overgeneralization. In cosmology, the expansion of space causes distant galaxies to recede from one another, but this does not imply that every object is moving away from every other object in all contexts—for example, gravitationally bound systems like galaxies within clusters do not continuously drift apart due to their mutual gravity. So this statement is not universally true.

Option 2 analysis: There is no central point in the universe is the standard cosmological view. In the homogeneous and isotropic cosmological models (theoretical frameworks like the Friedmann–Lemaître–Robertson–Walker metric), every location can be considered at the center of its own expanding coordinate grid, and there is no unique central point in the entire universe. Observations show no special center; the expansion looks the same from any location. This makes the statement true.

Option 3 analysis: The universe has no beginning and no end contradicts mainstream cosmology. The prevailing Big Bang model suggests a finite age for the universe, beginning from a hot, dense expansion about 13.8 billion years ago. While the ultimate fate and the nature of time’s beginning are topics of research, declaring no beginning and no end is not supported by current evidence.

Option 4 analysis: We are the centre of the universe and everything is moving away from us is a geocentric idea. Observations show that galaxies in all directions appear to recede; there is no privileged observation point at Earth that makes Earth the center. This viewpoint is inconsistent with the cosmological principle and evidence from redshift surveys, making it false.

Summary of reasoning: Option 2 aligns with the standard cosmological understanding that the universe has no central point and that expansion occurs from every location, without a unique center. The other statements misstate aspects of cosmic expansion or current cosmological consensus, either by overgeneralizing, positing a beginningless universe contrary to evidence, or asserting a center-based viewpoint that contradicts observations.

Which of the following statements is true?单项选择题

类似问题

对于银河系中的天体，z（或红移）总是远小于但对于遥远的星系，我们通常观测到的天体红移远大于…… 因为它们嵌入在一个宇宙之中，而这个宇宙是。

The figure below uses a rubber sheet as an analogy for Hubble expansion, with coins representing galaxies. The illustration demonstrates that

Which answer choice explains why furanoses and pyranoses can be reduced by sodium borohydride despite having no carbonyl functional groups.

Which of the following statements describes a glycoside?

Which of the following structures represents chitin?

In solution, glucose exists in

According to Xenophanes, what should be avoided at a symposium?

What is "kottabos"?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单