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In new research, scientists have shared data from a special observatory, and it’s lead them to theorize that dark energy may be weakening. This data all comes from the first year of observation of the Dark Energy Spectroscopic Instrument (DESI), an array of 5,000 robots that have worked together to map the cosmos in more detail than ever before.
While we don’t yet fully understand dark energy, a shift in our core understanding of the concept—from thinking of it as constant to thinking of it as weakening—could affect all of physics, and influence how our universe eventually ends.
When talking about the history of the universe today, scientists use a paradigm called the Lambda Cold Dark Matter (ΛCDM) model—a mathematical equation that works out in harmony with our current understanding of the Big Bang origin of the universe. And an essential part of it is the cosmological constant, lambda, which dates back to Albert Einstein but has evolved over time in its purpose. Lambda’s constancy is essential to our understanding of the ΛCDM model, and the constant is closely linked with dark energy, which was also suggested to be constant.
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