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Strategic Defense Initiative
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The Strategic Defense Initiative (SDI), nicknamed the Star Wars program, was a proposed missile defense system intended to protect the US from attack by ballistic strategic nuclear weapons. The concept was announced in 1983, by President Ronald Reagan, a critic of the doctrine of mutual assured destruction (MAD), which he described as a "suicide pact". Reagan called upon American scientists and engineers to develop a system that would render nuclear weapons obsolete. Elements of the program reemerged in 2019 with the Space Development Agency (SDA).
The bright spikes extending below the initial fireball of one of 1952's Operation Tumbler–Snapper test shots, are known as the "rope trick effect". Th
The bright spikes extending below the initial fireball of one of 1952's Operation Tumbler–Snapper test shots, are known as the "rope trick effect". They are caused by the intense flash of thermal/soft X-rays released by the explosion heating the steel tower guy-wires white hot. The development of the W71 and the Project Excalibur x-ray laser were based on enhancing the destructive effects of these x-rays.
Extended Range Interceptor (ERINT) launch from White Sands Missile Range
Extended Range Interceptor (ERINT) launch from White Sands Missile Range
4 m (13 ft) diameter web deployed by Homing Overlay Experiment
4 m (13 ft) diameter web deployed by Homing Overlay Experiment
The 1984 SDI concept of a space based Nuclear reactor pumped laser or a chemical hydrogen fluoride laser satellite resulted in this 1984 artist's conc
The 1984 SDI concept of a space based Nuclear reactor pumped laser or a chemical hydrogen fluoride laser satellite resulted in this 1984 artist's concept of a laser-equipped satellite firing on another, causing a momentum change in the target object by laser ablation. Before having to cool and re-aim at further possible targets.
Space Development Agency
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The Space Development Agency (SDA) is a United States Space Force direct-reporting unit tasked with deploying disruptive space technology. A primary focus is space-based missile defense using large global satellite constellations made up of industry-procured low-cost satellites. The SDA has been managed by the United States Space Force since October 2022. By February 2024 the SDA had 33 satellites on orbit. SDA intends to have at least 1,000 satellites in low Earth orbit by 2026.
Space Development Agency
Space Development Agency
Rapid Reaction Launch Proliferated Ground C2 for the NDSA (National defense space architecture) of the Space Development Agency
Rapid Reaction Launch Proliferated Ground C2 for the NDSA (National defense space architecture) of the Space Development Agency
Earth's satellites in: Low Earth orbit— LEO (blue); Medium Earth orbit— MEO (green); Cislunar distances (red): If one were to hold a blue marble out a
Earth's satellites in: Low Earth orbit— LEO (blue); Medium Earth orbit— MEO (green); Cislunar distances (red): If one were to hold a blue marble out at arm's length, one would see Earth's size and shape from the perspective of the astronauts travelling to the Moon.
Image: Fred G. Kennedy III
Image: Fred G. Kennedy III