Universe

The universe is all of space and time and their contents, including planets, stars, galaxies, and all other forms of matter and energy. The Big Bang theory is the prevailing cosmological description of the development 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. While the spatial size of the entire universe is unknown, it is possible to measure the size of the observable universe, which is approximately 93 billion light-years in diameter at the present day. The earliest cosmological models of the universe were developed by ancient Greek and Indian philosophers and were geocentric, placing Earth at the center. Over the centuries, more precise astronomical observations led Nicolaus Copernicus to develop the heliocentric model with the Sun at the center of the Solar System.

Read more in the app

Privatised Universe: Exploiting the Cosmos

What is the largest known star in the universe? (What about the smallest?)

Calibrating the luminosity of nearby stars to refine calculations of universe age and expansion

How ghostly neutrinos could explain the universe’s matter mystery

Marvel's 'Fantastic Four' visits an alien universe in new Alex Ross graphic novel (exclusive)

Space roar: The mystery of the loudest sound in the universe

How Exotic Atoms Can Transform Into Windows Into The Nature Of The Universe

How Long Is the Drive to the Edge of the Universe?

Why This Is The Best New Apple iPhone 14 Accessory In The Universe

The number that is too big for the universe

NASA’s Hubble Space Telescope Finds Window Into Early Universe

Physicists invoke the cosmological collider to explain why matter, and not antimatter, dominates the universe

Hubble finds spiraling stars, providing window into early universe

Cosmic Explosions: New Way To Measure the Distant Universe

Scientists create coldest matter in the universe in a lab

James Webb Space Telescope photographs the most distant known star in the universe. The star, Earendel, started shining some 13 billion years ago.

Scientists create coldest matter in the universe in a lab

Universe unfolded at the World’s Top 50 Innovators 2022

It's raining diamonds across the universe, research suggests

Distant Worlds With 'Diamond Rain' May Populate The Universe, Scientists Say