The idea that the universe began from a single point and
expanded to its current size explains a large number of
observations, including those in the table below.

observations explained:
the universe consists mostly of low-mass elements.
cosmic microwave background is nearly the same in all directions.
light from other galaxies shows that these galaxies are moving away
from earth

in addition, many predictions based on the idea have led
to additional observations that support it. this idea of the
origin of the universe is best classified as a