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FreeAstroScience logo with a glowing star, open book, and Earth on a space-themed circular badge with the tagline Igniting Curiosity for free astronomy science education

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When lakes lose their winter pulse: Climate change and the hidden Nitrogen story

May 27, 2026May 27, 2026

Galaxies shaped by cosmic location just 1.2 billion years after the Big Bang

May 27, 2026May 27, 2026

Mercury’s polar water ice: new models suggest a larger, slower impact source

May 26, 2026May 26, 2026

New Cell Therapy Offers Hope for Advanced Liver Disease Patients

May 25, 2026May 25, 2026

FreeEdu

    What is the Quantum vacum state?

    Gerd DaniNovember 11, 2021March 28, 20260

    Quantum vacuum state is the quantum state with the lowest possible energy. Generally, it contains no physical particles. The QED…

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      What is deep learning?

      Gerd DaniOctober 26, 2021March 28, 20260

      Deep learning is a class of machine learning algorithms that uses multiple layers to progressively extract higher-level features from the…

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        What are the Borromean rings?

        Gerd DaniOctober 25, 2021March 28, 20260

        Borromean rings are a set of three interlinked, simple closed curves in three-dimensional space. If any one of the three…

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          What is a chemical bond?

          Gerd DaniOctober 10, 2021March 28, 20260

          Chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds. The bond…

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            What is an Algorithm?

            Gerd DaniOctober 3, 2021March 28, 20260

            Algorithm is a finite sequence of well-defined, computer-implementable instructions, typically to solve a class of specific problems or to perform…

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              What is an Acid?

              Gerd DaniOctober 1, 2021March 28, 20260

              AN Acid is a molecule or ion capable of either donating a proton ( hydrogen ion, H+) capable of forming…

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                What is an Active galactic nucleus?

                Gerd DaniSeptember 30, 2021March 28, 20260

                Active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much-higher-than-normal luminosity over…

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                  What is the Golden spiral?

                  Gerd DaniSeptember 20, 2021March 28, 20260

                  Golden spiral is a logarithmic spiral whose growth factor is φ, the golden ratio. That is, a golden spiral gets…

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                    What is a Radioactive decay?

                    Gerd DaniSeptember 18, 2021March 28, 20260

                    Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei…

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                      What is Bitcoin? How does it work?

                      Gerd DaniSeptember 14, 2021March 28, 20260

                      What is Bitcoin? Bitcoin is basically a peer-to-peer currency that we can buy, sell and exchange directly, without an intermediary…

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