If a satellite’s velocity increases as it approaches a planet during a slingshot maneuver, why does it not decrease by the same amount when it leaves the planet? How can it experience a net gain in velocity? Robert WaltyStephens City, Virginia Slingshot maneuvers can seem counterintuitive. We know that a spacecraft speeds up as itContinue reading "How do slingshot maneuvers work to propel spacecraft?"

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Romanian army divers used explosives to destroy two Russian-made drones found floating in the Black Sea near Romania’s largest natural gas project, according to the NATO member country’s defense minister.

Defense Minister Radu Miruță posted a Facebook video supposedly showing one of the drones being blown up in the water by explosive ordnance disposal divers of the Romanian army on August 11, as reported by Reuters and other news outlets. The drones were first spotted in the water by a ship working in the vicinity of the Neptun Deep—an offshore gas project under development in the Black Sea that will make Romania the largest gas producer in the European Union.

A Romanian Coast Guard ship that responded with army soldiers aboard found two drifting Gerbera-type drones of Russian design along with other debris. Miruță also disclosed that Romania had reached out to “Ukrainian partners who confirmed that the systems do not belong to them.”

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