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2H2KWEA Big Bang to Present. Stages in the history of the Universe after the Big Bang. At 300, 000 years, matter and radiation decouple, and the Universe becomes transparent for the first time. The first galaxies form at around 300 million years after the Big Bang, but the exact time period is uncertain. At an age of 9 billion years the Solar System formed. Finally, 13.7 billion years after the Big Bang we arrive at the present day. The Universe is still expanding and evolving.

Physics

What happens to light's energy when it redshifts? It's complicated

When it comes to cosmology, answering one question only leads to more. Just take light. Chanda Prescod-Weinstein dives into a reader's question

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Mathematics

These centuries-old equations predict flowing fluid – until they don’t

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Chaotic streams of energy appear to slice through space

Physics

Is gravity a new type of force that arises from cosmic entropy?

Features

The NIRCam (Near-Infrared Camera) instrument on NASA?s James Webb Space Telescope?s reveals a portion of the Milky Way?s dense core in a new light. An estimated 500,000 stars shine in this image of the Sagittarius C (Sgr C) region, along with some as-yet unidentified features. A large region of ionized hydrogen, shown in cyan, contains intriguing needle-like structures that lack any uniform orientation. NASA, ESA, CSA, STScI, and S. Crowe (University of Virginia).

Space

The cosmos is vast, so how do we measure it?

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Space

Bioplastic habitats on Mars could be built from algae

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Space

New Horizons images enable first test of interstellar navigation

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Physics

Where does time actually come from?

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Fireball in South Carolina. Screenshot from Facebook video posted by Kathryn Rose Farr on 26 Jun 2025

Space

Mystery fireball spotted plummeting to Earth over the US

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Vera C. Rubin Observatory

Video

Look inside the revolutionary Vera C. Rubin Observatory

Video

Trees against starry sky

Space

Why are the physical constants of the universe so perfect for life?

Conditions in our little pocket of the universe seem to be just right for life - and the much-debated anthropic principle forces us to wonder why

Features

Space

New ��ý recommends a new space show at the Hayden Planetarium

Culture

Space

Why you should join a watch party for the first Vera C. Rubin images

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Physics

The radical idea that space-time remembers could upend cosmology

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Space

Peer into the early universe as light bends around huge galaxy cluster

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