The Earth and Beyond

Telescopes.

A telescope is used to collect electromagnetic waves
from distant objects.

The first telescopes collected visible light waves from distant objects
and allowed people to see much more detail
than they could observe just by looking with their eyes.
People used telescopes to look at many objects on Earth
and some people used telescopes to look at the stars and planets.

Today there are many telescopes which people use
to gather information about the Universe.
Different telescopes collect electromagnetic waves
across the whole of the electromagnetic spectrum, not just light waves.

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