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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How the SKA Will Use Fast Radio Bursts to Decode the Universe

Are We Missing the Universe's "Noosignatures"?

Listening for the Universe's Faintest Whispers, a Billion Supernovae at Once

Why space games still struggle with the scale of the universe

The Universe Was Barely Born When These Giant Black Holes Appeared

Vera C. Rubin Observatory finally launches ambitious 10-year quest to reveal universe's secrets

After more than a decade of preparations, it’s the start of one of the most ambitious studies of the cosmos ever undertaken. For the next ten years, the LSST will capture the entire southern sky to create an ultra-wide, ultra-high-definition time-lapse record of our Universe.

Astronomers discover some of the most extreme primordial quasars in the universe

What if the Universe Isn’t as Uniform as Scientists Think?

Stunning new NASA space telescope images reveal the universe in red, white and blue for America 250

Galaxy Groups Hiding in the Universe’s Emptiest Places

NASA’s Chandra Reveals ‘Red, White, Blue’ Universe for US 250th

The most detailed survey of the universe ever conducted starts now

This physicist is hunting for the biggest black hole in the universe

Mammoth Structure Found in Deep Space Challenges Our Understanding of The Universe

The James Webb Space Telescope peered into one of the universe's oldest galaxy clusters, and scientists can't explain what they saw

'Exodus: The Helium Sea' author Peter F. Hamilton talks universe crafting and finishing the story in this second prequel novel for sci-fi RPG 'Exodus' (exclusive)

James Webb Space Telescope catches 6 galaxies merging into one of the largest galaxies in the universe

The Universe's First Stars Were Shaped By Turbulence and Were Not As Massive as Thought

Fundamental principles of the universe called into question by two physicists