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What is Cosmology?

Cosmology is the study of the origin of the universe, how it became what it is today, and how it continues to evolve.

COSMOLOGY MEANING

To uncover whether the universe has underlying order, it is essential to understand how, or if, the universe began. And to believe that the universe has purpose begs some understanding of how it all came to be.

Here you'll find a diverse collection of articles, videos and other resources that elaborate on cosmological models, theories, and research for a deeper understanding of how our universe works and what its purpose may be.

FREE VIDEO SERIES: EVIDENCE FOR THE BIG BANG

Subscribe to access three free videos about evidence for the Big Bang Theory

Free video series: Evidence for the Big Bang | Image of a tablet featuring a video of space with the title "3 Key Pieces of Evidence"

HISTORY OF COSMOLOGY

Our knowledge and understanding of the universe is ever changing as generations of scientists build on the discoveries of those before them. The articles and videos below dive into a few key moments in the history of cosmology.

stars and light trails over the horizon

FORMATION OF THE UNIVERSE

Articles and videos about whether and how the universe began
red and orange atmospheric clouds with stars in the sky

STARS, GALAXIES, AND BLACK HOLES

Read, watch, and learn about the cosmology of stars, galaxies, and black holes.

stars in the galaxy

EXOPLANETS AND EXTRATERRESTRIAL LIFE

With an average of over one exoplanet per star in the universe, it seems very possible that there could be life on other plants. 

desolate mountains and sand

THE JAMES WEBB SPACE TELESCOPE

News and information about the exciting James Webb Space Telescope

Image credit: NASA

james webb taking off
WATCH VIDEOS

VIDEOS ABOUT COSMOLOGY

Watch experts' discoveries and positioning on cosmology to learn more about cosmological arguments and the science that governs our universe.

WATCH SHORTS

SHORT COSMOLOGY VIDEOS

Only have a minute? These short videos are packed with amazing facts and insights about cosmology.

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COMMON COSMOLOGY QUESTIONS

Answers to frequently asked questions about cosmology:

What is the evidence for the Big Bang? Maggie Ciskanik, M.S., MSc. explains evidence for the Big Bang, including Lemaitre/Hubble Expansion, Cosmic Microwave Background Radiation, and Even Distribution of Matter.
What happened before the Big Bang?
What is Dark Matter? Scientists still aren’t sure what Dark Matter is or if it really exists. The existence of dark matter is based on indirect evidence. Read more in Dr. Vera Rubin and Why Dark Matter Matters.
How old is the universe? Astronomers believe the universe is 13.7 years old.
Could there be intelligent life elsewhere in the universe? Are We Alone? In this video a Harvard Astronomer discusses the possibility of extraterrestrial life.
Why is cosmology important? Dr. Karin Öberg explains why cosmology matters in this video.
FOLLOW ALONG

For more cosmology content, follow the Purposeful Universe on Instagram