Skyhooks are theoretical devices that could lift objects into the atmosphere without the need for traditional rockets. They would use a long cable anchored to the ground, with a counterweight in space, allowing for the transportation of materials and people. This concept is often discussed in the context of space exploration and engineering. The idea of skyhooks is linked to other advanced concepts like space elevators and orbital tethers. While they remain largely theoretical, skyhooks could potentially reduce the cost and complexity of reaching orbit, making space travel more accessible in the future.