Faulty cable responsible for latest James Webb Space Telescope launch delay

A faulty data cable between the James Webb Space Telescope and launch pad equipment at Europe’s Spaceport in Kourou, French Guiana, caused the big observatory’s latest launch delay, European Space Agency (ESA) and NASA representatives said in a briefing on Thursday (Dec. 16). 

ESA, which has about a 10% stake in the James Webb Space Telescope mission, is providing the rocket that will send the 6.5-metric-tonne telescope into space. The Ariane 5 rocket, operated by European company Arianespace since the mid-1990s, is one of the most reliable launchers available.