Question: Which passage from the article best supports the idea that the distant galaxies were young? The technique enabled the telescopes to detect a lot more light and observe distances that would otherwise make visibility impossible. It's difficult to calculate the exact age of a galaxy, but scientists consider ours to be "middle-aged." An analysis of the galaxies' brightness suggested that they were in an early stage of formation. As far as how galaxies develop, that's one of the hottest topics in astronomy.