Our Universe

Universe

 The universe is everything that exists or has ever existed, including all matter, energy, space, and time. It can also mean the cosmos, the world, or nature. Some people think that the universe also contains ideas and abstract concepts, like math and logic. The Universe contains billions of galaxies, each containing millions or billions of stars. The space between the stars and galaxies is largely empty. However, even places far from stars and planets contain scattered particles of dust or a few hydrogen atoms per cubic centimeter. Space is also filled with radiation (e.g. light and heat), magnetic fields and high energy particles (e.g. cosmic rays).

Image Credit - Medium

Where do we live in our Universe?

We live in the Milky Way galaxy, which is one of billions of galaxies in the universe. The Milky Way is a barred spiral galaxy that is part of the Local Group of galaxies. The Local Group contains more than 54 galaxies, including the Andromeda Galaxy and the Triangulum Galaxy.

Image Credit - The Spokesman-Review

Structure of our Universe

The structure of the universe is the result of the expansion, cooling, and gravity of the energy and matter that originated from the Big Bang. The universe has no edge or center and is composed of organized structures on different scales, from the Solar System and its members to galaxies and their constituents to clusters, superclusters, filaments, and voids that form a huge web. These structures are influenced by the presence and distribution of dark matter, which attracts ordinary matter. The universe is almost homogeneous at the largest scale, but has variations that reflect the primordial fluctuations of the quantum particles.

Universe in 3-D

How was our Universe formed?

Most astronomers think that the Universe was formed during an event called the Big Bang - a giant explosion which occurred between 10 and 20 billion years ago. During the Big Bang, all of the space, time, matter, and energy in the Universe was created.

Image Credit - Wikipedia

What was Big Bang?

The Big Bang theory is the prevailing cosmological model that explains the origin of the Universe. According to this theory, space and time emerged together 13.787 ± 0.020 billion years ago, and the Universe has been expanding ever since the Big Bang .

The Big Bang theory suggests that the Universe began as a very hot and dense state, which then expanded rapidly in a process called inflation. As it expanded, it cooled down and matter began to form. The first atoms were formed about 380,000 years after the Big Bang.

Information credits - 

                                                        1. en.wikipedia.org

                                                        2. universetoday.com

       3. cosmos.astro.caltech.edu4. simple.wikipedia.org5. spacecentre.nz          6.bing.com                   Contact me - gauravdeepgd12007+contactme@gmail.com