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Astronomy

Explore stars, galaxies, telescopes and the methods astronomers use to investigate objects far beyond Earth.

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NASA visualization of a neutron star with X-ray beams and an accretion disk
EDITOR’S PICK

What Is Inside a Neutron Star?

A neutron star compresses more mass than the Sun into a sphere the size of a city, turning its interior into a laboratory for matter beyond terrestrial reach.

Sep 13, 2026 • 11 min readRead the discovery →
LATEST

Latest discoveries

New stories, explanations and research from Astronomy.

High-resolution astronomical spectrum showing many narrow absorption lines
Astronomy

How Starlight Reveals the Elements in Distant Suns

A star’s spectrum contains patterns tied to atomic energy levels. Reading those patterns reveals composition, while temperature, motion and line blending complicate the analysis.

Sep 23, 2026 • 3 min read
NASA visualization of a neutron star with X-ray beams and an accretion disk
Astronomy

What Is Inside a Neutron Star?

A neutron star compresses more mass than the Sun into a sphere the size of a city, turning its interior into a laboratory for…

Sep 13, 2026 • 11 min read