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Planck scanning the sky

Science & Exploration Planck science highlights

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ESA / Science & Exploration / Space Science / Planck

The Cosmic Microwave Background (CMB) preserves a picture of the Universe as it was about 380 000 years after the Big Bang, and can reveal the initial conditions for the evolution of the Universe. Planck’s main objective was to measure the fluctuations of the CMB with an accuracy set by fundamental astrophysical limits in order to chart the most accurate CMB maps yet.

With instrument detectors so sensitive that they could distinguish temperature variations of a few millionths of a degree, the large and smooth surface of its telescope and its unprecedented wavelength coverage, Planck was the most sophisticated 'time machine' ever launched.

Planck was launched in 2009 and spent 4.5 years scanning the sky to study the evolution of cosmic matter over time.

Key discoveries

History of structure formation in the Universe

History of structure formation in the Universe

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European Space Agency

2025-09-15 04:20 点击量:0