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NASA’s Space Umbrella Project: Earth’s magnetic field vs. solar winds (Image source: NASA) There is a constant outward flow of charged particles from the Sun. This flow, known as the solar wind, moves across space and reaches Earth every day. When it arrives, it meets the planet’s magnetic field, an invisible region that bends and…
NASA finds Earth’s magnetic field may be the hidden reason oxygen has lasted for millions of years Scientists have debated for decades whether Earth’s magnetic field plays a role in keeping the planet habitable. The question matters because Earth stands apart from other rocky worlds. It has a long-lived magnetic field generated deep inside the…
Something unusual keeps turning up in marine sediments. These are large crystals of magnetite, formed by biology rather than geology, and preserved for tens of millions of years. Known as giant magnetofossils, they are far bigger than the magnetic particles made by bacteria today, often reaching several microns in size. They appear in rocks dating…
NASA plans a mission to study the Sun’s magnetic heart and its hidden storms NASA has selected a proposed solar mission for further study as part of its Small Explorer programme, extending early design work rather than approving a launch. The mission, known as the Chromospheric Magnetism Explorer, or CMEx, will now move into an…
