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 the Big Bang. 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. Some of 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.

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The James Webb Space Telescope may have finally found the 1st stars in the universe

Remember That Paper Claiming The Universe Is Decelerating? Here's What A Nobel Laureate Has To Say About It

Scientists Create 3.3 Trillion Degree Particle Soup to Mimic the Universe Just after the Big Bang

The Standard Cosmological Model Is The Simplest Model Of The Universe, But Not The Only One

The Universe is Decelerating and Standard Candles Aren't So Standard According to a New Study

JWST may have made the monumental first detection of Population III stars - first stars to form in the universe, shortly after the Big Bang - in a star cluster "LAP1-B" around 13 billion light years away

The Universe’s Expansion May Be Slowing Down, Not Speeding Up, New Research Suggests

Is the Universe Slowing Down? Stunning New Evidence Says Yes

“Cannibal Stars” and Black Holes May Have Formed in the Universe’s First Second

'The universe will get colder and deader from now on': Euclid telescope confirms star formation has already peaked in the cosmos

Planets may make their own water as they form — could that mean more habitable worlds in the universe?

Cosmic Dust Bunnies - Why the Universe Might Be Fluffier Than We Thought

Physicists prove the Universe isn’t a simulation after all

Dark energy might be changing and so is the Universe

Scientists Recreate the Fiery Birth of the Universe in the Lab

Itâs Official: Astronomers Confirm the Universe's Oldest Black Hole

CERN creates cosmic “fireballs” that could reveal the Universe’s hidden magnetism

This Strange Particle May Hold Clues to the Universe’s Biggest Secrets

Universe's expansion 'is now slowing, not speeding up'

Our Universe Has Already Entered Decelerating Phase, Study Suggests