What does "Evolution Bias" mean?

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Evolution bias refers to the differences in how we observe and measure certain objects in space based on their brightness and distance. When looking at galaxies, for example, the way they appear can change over time due to their growth and development. This can affect how scientists interpret data from various surveys.

In simpler terms, if we look at a group of galaxies, some will look brighter because they are closer or more active. If we don’t properly account for these differences, it can lead us to make incorrect assumptions about the universe's structure and the relationships between different galaxies.

Understanding evolution bias helps researchers get a clearer picture of how galaxies form and change over time, which is vital for studying the universe.