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    BBC Sky at Night1 min read
    Step By Step
    Start with your scope in parked position, facing north with the finderscope aligned. Set the altitude to that of Polaris (+52 in the UK). Align on it (follow your mount's instruction manual). Mounts with built-in polarscopes can get an accurate polar
    BBC Sky at Night3 min read
    Photograph comet C/2023 A3
    This is the month when we may or may not see comet C/2023 A3 Tsuchinshan–ATLAS, depending on whether it survives perihelion on 27 September, when it passes within 58.6 million kilometres of the Sun. Assuming it survives, it should become visible afte
    BBC Sky at Night3 min read
    Dark Matter
    According to the successful standard model of particle physics, everything in the material Universe – galaxies, stars, planets and people – consists of protons, neutrons and electrons. In addition, elusive neutrinos that hardly interact with other pa

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