spatial observation

Magnetic fields in space: observation and role

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Les champs magnétiques dans l'espace : observation et rôle

IN BRIEF Galactic magnetic fields: possibility of accelerating cosmic rays. Interplanetary magnetic field: values between 10−10 and 10−8 T. Impact of solar wind on the magnetic field. Cosmic magnetic fields influence the structure of stars and galaxies. Variations in the magnetic field of stars: information about their geometry. Study of magnetic fields is crucial for … Read more

The limits of the observable universe: how far can we see

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Les limites de l'univers observable : jusqu'où peut-on voir

IN BRIEF Observable universe : Visible part of the universe, limited by the cosmic horizon. Size of the universe : Estimated to be at least 96 billion light-years. Cosmic horizon : Boundary beyond which the universe remains opaque. Cosmic microwave background : Light from the Big Bang visible at about 13.8 billion light-years. Expansion of … Read more