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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Galactic Archaeology: Unlocking the Universe’s Oldest Mysteries With Webb

Astronomers in Chile to Scour Universe with Car-Sized Mega Camera

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A giant space laser triangle carrying golden cubes will listen to the universe

Scientists are building tunnels under South Dakota for a $3 billion experiment that could solve some of the universe's grandest mysteries

Webb finds dwarf galaxies reionized the universe

Listen to the Universe: New NASA Sonifications and Documentary

Gamma-Ray Bursts: Unraveling the Mysteries of the Universe With the Most Powerful Explosions

Unlocking the Nuclear Secrets of the Universe’s Strongest Magnetic Fields

The Strongest Magnetic Fields in The Universe Could Be Right Here on Earth

Scientists closer to solving mysteries of universe after measuring gravity in quantum world

A New Space Telescope will Map the Universe and Help Protect the Earth from Asteroids

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A New, More Accurate Measurement for the Clumpiness of the Universe

The Brightest Object Ever Seen in the Universe

A ravenous black hole created the universe’s brightest object, study says

Astronomers discover universe’s brightest object – a quasar powered by a black hole that eats a sun a day

Brightest Object in the Universe Discovered – Powered by Supermassive Black Hole Eating a Sun a Day

Major X-ray sky survey could relieve crisis surrounding the universe's 'lumpiness'

Monster black hole powers the brightest known object in the universe