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Could 2025 be the year we finally start to understand dark energy?

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An artistic celebration of the first annual Dark Energy Spectroscopic Instrument (DESI) data, showing part of the larger 3D map that DESI is building over five years of surveys. By mapping objects from different periods of cosmic history with great precision, DESI allows astronomers to make unprecedented measurements of dark energy and its effect on the accelerated expansion of the Universe. DESI's map shows the large-scale structure of the Universe, showing clusters of galaxies separated by gaps where there are fewer objects. This pattern is the result of large pressure waves that swept through the early Universe and is reflected in the cosmic microwave ??? A 2D picture of the radiation that filled the Universe shortly after the Big Bang, with a trace of the 3D distribution of galaxies. DESI is mounted on the US National Science Foundation's Nicholas U. Mayall 4-meter telescope at Kitt Peak National Observatory, part of the NSF NOIRLab program. This version of the DESI map includes 600,000 galaxies ??? less than 0.1% of the total survey volume. The locations of the objects in the dataset are not related to the locations on the sky shown in this image.

This model of the rainbow shows the structure of 60,000 galaxies as captured by the Dark Energy Spectroscopic Instrument.

DESI Cooperation/KPNO/NOIRL​ab

We believe dark energy it makes up most of the universe, but we don’t know what it really is. In 2025, the Dark Energy Spectroscopic Instrument (DESI) in Arizona may offer clues, particularly how this strange force has changed as the universe has matured.

“Either there’s some new form of dark energy that we don’t know about yet or this could be a paradigm shift, maybe (the data will show) that there’s something about space and time that we don’t understand,” he says…



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