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space-time

How does astronomy fit into astrophysics – and does it matter?

Physics

How does astronomy fit into astrophysics – and does it matter?

We need to think more carefully about how we categorise the universe, says Chanda Prescod-Weinstein

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Images that capture our timeless obsession with the moon

Images that capture our timeless obsession with the moon

Regulars

Space

Maybe NASA’s SLS should be cancelled – but not by Elon Musk

Analysis

Space

Distant exoplanet may be the most volcanic world ever found

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Space

How meteorites are rewriting the history of the solar system

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Space

Astronomers have spotted the largest known object in the universe

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Physics

The 100-year-old symmetry theorem that is still changing physics today

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The best new science fiction books of February 2025

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The best new science fiction books of February 2025

Culture

These interstellar spaceship designs are wildly impractical

Space

These interstellar spaceship designs are wildly impractical

Comment

Caption This image from NASA?s James Webb Space Telescope shows a portion of the Leo P dwarf galaxy (stars at lower right represented in blue). Leo P is a star-forming galaxy located about 5 million light-years away in the constellation Leo. A team of scientists collected data from about 15,000 stars in Leo P to deduce its star formation history. They determined that it went through three phases: an initial burst of star formation, a ?pause? that lasted several billion years, and then a new round of star formation that is still continuing. The image from Webb?s NIRCam (Near-Infrared Camera) combines infrared light at wavelengths of 0.9 microns (represented in blue), 1.5 microns (green), and 2.77 microns (red). The stars in Leo P appear blue in comparison to the background galaxies for several reasons. Young, massive stars that are common in star-forming galaxies are predominantly blue. Leo P also is extremely lacking in elements heavier than hydrogen and helium, and the resulting ?metal-poor? stars tend to be bluer than Sun-like stars. A bubble-like structure at bottom center is a region of ionized hydrogen surrounding a hot, massive O-type star. Credits Image NASA, ESA, CSA, Kristen McQuinn (STScI) Image Processing Joseph DePasquale (STScI)

Space

James Webb captures a beautiful smattering of blue stars

The striking blue stars of the Leo P dwarf galaxy appear dashed across the lower right corner of this image from NASA's James Webb Space Telescope

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Space

The physicist trying to build humanity's lunar future with moon dirt

Features

Space

Incredible images show the moment SpaceX's Starship exploded

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Space

See comet C/2024 G3 (ATLAS) as viewed from Earth's orbit

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Space

The physicist on a mission to understand Mercury's epic solar storms

Features

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