Starfish Prime: US Nuked Space

Project Fishbowl aimed to better understand nuclear explosion effects in space, preparing for Cold War conflicts where one side might strike others.The tests had more specific goals.They sought to manipulate the recently discovered Van Allen radiation belts, which are magnetically trapped, high-energy protons surrounding Earth.

James A. Van Allen identified the belts in 1958. He immediately agreed with the US government to destroy or disrupt the field because they feared Russia would do the same. Science historian James Fleming suggests some US scientists theorized weaponizing the belts; releasing enough energy might let the Van Allen belt channel it to a ground target.

Starfish Prime was the largest spacefaring nuclear explosion, though not the only one. The thermonuclear warhead on a Thor rocket carried a massive payload.The yield reached 1.45 megatons.This included an incendiary device potential equal to 1,450,000 tons of TNT, about 100 times more powerful than the one dropped on Hiroshima at the end of World War II.

The US government usually keeps advanced military tests secret, but hiding a space nuclear explosion from the world is hard. So, the US government publicized the Starfish Prime test early. Countless newspaper headlines showed a bright light show for anyone watching the skies; people got excited.Other headlines and several demonstrations, however, caused protests against nuclear testing in space.Protests occurred against nuclear testing in space.

Starfish Prime was set to launch at Johnston Atoll because of its remote location.The remote location dictated the launch site.It launched about 940 miles southwest of Hawaii in the middle of the Pacific Ocean. Many thought this placement would stop the experiment from harming crowded areas. Before the show, some hotels in Honolulu offered something.Some hotels in Honolulu offered.They offered 'Rainbow Bomb Parties' on their rooftops.

The test started around 11 pm HST. The Thor projectile sent the warhead to about 660 miles up, then dropped it to 240 miles before it exploded in Earth’s thermosphere. The warhead burst high over the Pacific andgenerated a flash.This flash lit up the night across most of the Pacific. A brilliant red aurora, looking like a sunset at midnight, followed for several minutes, visible from Tonga to Samoa.

Scientists knew a nuclear blast could cause an electromagnetic pulse, or EMP, which disrupts electronics. Until Starfish Prime, they did not know how widespread or destructive those effects would be.The EMP generated by Starfish PrimeThe blast was so powerful it reached several Hawaiian islands, even though they sat hundreds of miles from the launch site.

Hundreds of streetlights on Hawaii blew out at once. Telephone lines and radio signals also went down. Aircraft at higher altitudes over the Pacific felt electrical surges, but no crashes occurred.

The "Starfish Prime" Let Loose event involved an unexpected EMP burst that knocked out electrical devices 900 miles away.The event occurred on the island of Kauai.The island of Kauai was hit hardest by the Starfish Prime EMP burst. This cut the island off from the rest of the world. Kauai's people could not contact any other Hawaiian islands or the US mainland.

The most spectacular after-effect of the Starfish Prime nuclear test was theexpansive, long-lasting auroraIt generated across much of the Pacific. This happened because electrons rained down on Earth’s atmosphere.Electrons rained down uponThe event collided with Earth’s atmosphere, making a dazzling visual effect like fireworks. This flashy side effect recreated the process behind the aurora borealis.

AThe Department of Defense report.The report captured the scene in terrifying technical detail.::

From its surface, great white fingers extruded, looking like cirro-stratus clouds. These rose 40 degrees above the horizon in sweeping arcs, turning down toward the poles. They vanished in seconds, replaced by concentric cirrus rings moving out from the blast with huge initial speed. The rings stopped when the outermost ring hit 50 degrees overhead. As the purplish light shifted to magenta and faded at the burst point, a bright red glow started on the horizon. This glow appeared 50 degrees north of east and 50 degrees south of east, expanding inward and upward until the entire eastern sky became a dull, burning red semicircle, 100 degrees north to south and halfway to the zenith, blocking some lesser stars. This condition, mixed with huge white rainbows, lasted 90 minutes.

The aurora from the Starfish Prime explosion reached far. Electrons clashed with atoms across the entire Pacific Ocean or, as theThe Department of Defense describedit:

[A] very large area of the Pacific showed auroral phenomena. This stretched from south of the south magnetic conjugate area (Tongatapu) through the burst area to north of the north conjugate area (French Frigate Shoals).

The blast and its after-effects were so brilliant they wereSeveral cameras captured the scene.back on Earth. The aurora appeared on theThe cameras captured the opposite side of the equator.from the launch site. The blast and its after-effects could be seen by many, but no one heard it.

Starfish Prime aimed to end the threat of the Van Allen radiation belts using nuclear devices. The test failed; it did the opposite.

Electrons from the blast hit Earth’s atmosphere, causing brilliant aurorae. Some radiation stayed in orbit, creatinganother radiation belt.This belt did not last forever. It stuck around for several months, causing some damage.

Several satellites, includingTelstar created the largest artificial radiation belt in history., the first telecommunications satellite launched a day after the test.These satellites were damaged or disabled.At least six confirmed cases show malfunctioning satellites directly from the test. Some fell to Earth.

Starfish Prime failed to disrupt the Van Allen belts. However, the test yielded scientific value. Researchers learned about polar and tropical air mass movement thanks to a cadmium-109 tracer in the warhead.a cadmium-109 tracerthat was in the warhead.

The explosion's massive electromagnetic pulse established the basis for understanding EMPs.modern EMP understanding related to nuclear devices.This study addressed informational gaps regarding EMPs and nuclear devices. Starfish Prime shows what not to do, but it still offers a lesson for humanity.

Starfish Prime greatly affected world politics. The test's severe after-effects, plus Soviet and American high-altitude blasts in 1962, shifted public opinion toward banning such tests, prompting leader responses.

President John F. Kennedy and Premier Nikita Khrushchev met on July 25, 1963, to sign theLimited Nuclear Test Ban Treaty.Telstar outlawed further atmospheric or exoatmospheric nuclear testing. The Cold War stayed an issue, but nukes would no longer reach space.

Hawaii felt Starfish Prime's impact. New Zealand, over 800 miles away, experienced unexpected aurorae and reduced electrical disruptionfrom the EMP.The EMP produced the light.

The blast was so bright that the Royal New Zealand Air Force members found a unique advantage for their work.recorded by the Department of Defense:

The Royal New Zealand Air Force got help with anti-submarine maneuvers from the light of the incendiary device.

Project Fishbowl involved destructive forces. People might think the Starfish Prime test used extreme care. The government ran the same test just two weeks later.The first attempt failed.On June 20, 1962, a Thor rocket issue stopped Starfish Prime's first flight minutes after launch. This required a detonation about 30,000 feet above Earth.

The unexpected explosion in the stratosphere sent radiation onto Johnston Atoll. This area is a wildlife refuge and airbase where the test started. Plutonium and americium contamination, compared to a 'dirty bomb,' stays on the atoll now.