When scientists look at very distant galaxies through powerful telescopes, they see the galaxies as they were millions or billions of year ago. why is this?

2%? i tried finding the exact sorry if it's not 100% correct ; -;

the potatoes have high sugar concentrations and although these potatoes were different we could seethe effects that their sugar concentrations had in different environments. for example, the potatoes in sample a, were placed in pure water. this created a hypertonic environment and caused the potatoes to draw in water from its surroundings. we saw the opposite happen with the potatoes in sample b when placed in the sodium chloride solution. the potatoes in this case were in a hypotonic solution and therefore lost water to their surroundings.