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Joined 13 days ago
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Cake day: March 13th, 2025

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  • True, but the primary advantage comes from the Earth’s rotational speed rather than a significantly weaker gravitational field. The Earth’s rotation provides an additional velocity boost to rockets, which helps reduce the fuel needed to reach orbit.

    However, your remark is valid and is also addressed in the article (in the part behind the paywall):

    Rockets launching close to the equator get a boost. Thanks to the planet’s spin, they start out travelling much faster relative to the centre of Earth than rockets launching near the poles.

    Andøya Space Center is located at 69° north, so Earth’s rotational speed is considerably weaker there than in French Guiana. But this isn’t important for high-inclination orbits: those that make a bigger angle with the equator.

    Isar Aerospace says it will be able to put 1500-kilogram payloads into orbit up to 30 times a year, in orbital inclinations from 90° to 110.6º. This would include sun-synchronous orbits - those that always pass over a given point at the same local time - which are ideal for spy and weather satellites. Isar already has a contract to put Arctic Ocean surveillance satellites into just such an orbit for the Norwegian Space Agency.

    The launch site is also reasonably free of air and marine traffic, and it benefits from all the infrastructure needed for small launch vehicles. “It will be more limited in terms of what you can achieve, but it’s still, I think, reasonable,” says Amato.