The concept of time dilation is indeed an important aspect of the theory of relativity and is often discussed in scientific contexts. However, when it comes to discussions about potential contact with extraterrestrial life or the possibility of alien civilizations, there are several reasons why time dilation may not be emphasized as frequently. Here are a few key points to consider:
Lack of Information: Our current understanding of the universe and our knowledge of potential alien civilizations is limited. We have not yet made direct contact with extraterrestrial beings or discovered concrete evidence of their existence. Without concrete knowledge of their biology, technology, and the physical conditions they reside in, it is challenging to make definitive statements about the specific effects of time dilation on potential alien civilizations.
Relatively Small Time Scales: The time dilation effects become significant when velocities approach the speed of light or when dealing with extremely strong gravitational fields, such as those near black holes. While it is possible that advanced alien civilizations might have access to technology that allows them to travel close to the speed of light or manipulate gravitational fields, it is uncertain if such capabilities exist or are achievable. Therefore, the time dilation effects might not be a prominent factor in discussions about potential alien life.
Communication and Perspective: When discussing the possibility of contact with extraterrestrial civilizations, the focus is often on aspects such as communication methods, technological advancements, and the potential for mutual understanding. Time dilation, while an intriguing aspect of relativity, may not be the primary consideration in these discussions. Additionally, different frames of reference and variations in time perception could pose challenges to communication and coordination between civilizations experiencing significant time dilation.
Speculative Nature: Discussions about extraterrestrial life often involve a degree of speculation and imagination due to the lack of empirical evidence. The effects of time dilation, while rooted in scientific theory, may be more difficult to incorporate into speculative discussions without concrete knowledge of the specific conditions and characteristics of potential alien civilizations.
It is worth noting that as our understanding of the universe advances and if we ever do establish contact with extraterrestrial life, the implications of time dilation and other relativistic effects may become more relevant to those discussions.