The Vastness of the Universe: Exploring Our Cosmic Address

🌌The universe is composed of various structures, including galaxies, galaxy clusters, and superclusters.

🌠There are vast voids between galaxies, with some spanning hundreds of millions of light years.

🌎Our Earth is part of the Solar System, which is located within the Milky Way galaxy.

🪐The Milky Way is just one of billions of galaxies in the universe, each containing billions of stars.

🌌Superclusters of galaxies are the largest known structures, consisting of numerous galaxy groups and clusters.

What is the cosmic address?

—The cosmic address refers to the hierarchical structure of the universe, from smaller objects like planets and stars to larger structures like galaxies and superclusters.

How big is the universe?

—The true size of the universe is still unknown, but it is estimated to be at least 93 billion light years in diameter and potentially much larger.

What is dark matter?

—Dark matter is an invisible substance that does not interact with light or electromagnetic radiation. It is thought to make up a significant portion of the total mass in the universe.

How are galaxies formed?

—Galaxies are formed through the gravitational collapse of gas and dust clouds. Over time, these collapsed regions accumulate more matter and eventually form star systems, like our own Milky Way galaxy.

What is a supercluster?

—A supercluster is a large collection of galaxy groups and clusters. It is one of the largest known structures in the universe and is formed by the gravitational attraction between numerous galaxies.

00:13Introduction to the vastness of the universe.

01:00Explanation of cosmology and the study of the entire universe.

02:58Overview of the four key pieces of big bang cosmology: cosmological principle, cosmic redshift, cosmic microwave background, and big bang nucleosynthesis.

04:40Discussion of the cosmic address, starting with Earth and the solar system.

06:15Explanation of the Milky Way galaxy and its composition of billions of stars and other objects.

08:53Zooming out to the local galactic group and superclusters of galaxies in the Virgo Supercluster.

10:53Introduction to the vast structure of the universe, including voids and the foamy-like connections of superclusters.

12:04Final overview of the local superclusters and the expansive size of the universe.