The challenge for astronomers, as it would be for the biologists, is to grasp how the species observed at the earliest times evolved into what we know today.
The challenge for astronomers, as it would be for the biologists, is to grasp how the species observed at the earliest times evolved into what we know today.
天文学家和生物学家所面临的挑战都一样，都想了解观察到的星系（物种）如何从早期形态演变成今日我们所知的模样。