A Wonderleaf question
How do telescopes see faraway things?
a real page from the book
Telescopes see faraway things by collecting much more light than your eyes can. A wide lens or mirror gathers rays from a distant object and brings them into focus. Then another lens makes the image look larger, so faint details become easier for your eye to notice.
That is why a telescope can show Saturn's rings or Jupiter's moons from a backyard. It is not pulling space closer; it is catching a larger sample of the light already arriving here. Bigger mirrors help because they collect more light from very dim, distant places.
Wonder words
- lens
- mirror
- focus
- orbit
Try it out
Look at a faraway sign through a paper tube, then compare it with your uncovered eyes.
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