This section is about the Universe and astronomy as a
whole. It is subdivided into four parts. WHAT IS THE
UNIVERSE? looks at different kinds of objects in the
Universe and the forces governing how they behave
and interact. THE BEGINNING AND END OF THE UNIVERSE covers the
origin and history of the Universe, while THE VIEW FROM EARTH explains
what we see when we look at the sky. EXPLORING SPACE is a history of
humankind’s study of the Universe and our journeys beyond the Earth.