Yellow star (sun) schematics showing its inner structure

Observing the Sun: Its Structure and Layers

November 18, 2021

Because of its closeness to the Earth, the Sun is the most thoroughly studied star. Our knowledge of the Sun and the observations of distant stars help us understand the life cycles of other stars. […]

An illustration of the Big Bang and the expansion of the universe

The Evidence for Origin of the Universe

November 17, 2021

The three lines of evidence for the Big Bang being the origin of the universe are universal expansion, the cosmic microwave background, and the abundance of light elements. […]

A digital illustration of the expansion of the universe from the Big Bang to the present.

Understanding the Nature of the Big Bang Theory

November 16, 2021

The Big Bang theory suggests that the universe came into existence at one specific point in time. It also indicates that the universe subsequently went through significant expansion after its birth. […]

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