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- A magnetohydrodynamic drive or MHD accelerator is a method for propelling vehicles using only electric and magnetic fields with no moving parts, accelerating...42 KB (4,366 words) - 08:23, 19 April 2024
- A primary body – also called a central body, host body, gravitational primary, or simply primary – is the main physical body of a gravitationally bound...3 KB (351 words) - 01:58, 22 October 2023