Theory of Knowledge - Course Companion for Students Marija Uzunova Dang Arvin Singh Uzunov Dang

a literal level we can measure the scope of
On
by its reach: our robots have landed on
technology
and reached the further vestiges of the solar
Mars
and our microscopes can now “see” at a
system,
of half the width of a hydrogen atom.
resolution
of radio programming are radiating
Decades
a hundred light years across, announcing
bubble
existence to anyone listening. But in the
our
of the size of our galaxy, the reach of
context
broadcasts is rather small—represented, for
these
by the blue dot in Figure 3.1. At a galactic
example,
our technological footprint is tiny; and does
scale,
I. Scope
I. Scope
I . S C O P E
not even register at the scale of our universe.
broadcast signals into space in an expanding
Figure 3.1
How far human radio broadcast signals have reached into the galaxy
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