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S74-23458 (19 Dec. 1973) --- This photograph of the sun, taken on Dec. 19, 1973, during the third and final manned Skylab mission (Skylab 4), shows one of the most spectacular solar flares ever recorded, spanning more than 588,000 kilometers (365,000 miles) across the solar surface. The last picture, taken some 17 hours earlier, showed this feature as a large quiescent prominence on the eastern side of the sun. The flare gives the distinct impression of a twisted sheet of gas in the process of unwinding itself. Skylab photographs such quiescent features erupt from the sun. In this photograph t…
![SKYLAB (SL)-3 - EXPERIMENTS (APOLLO TELESCOPE MOUNT [ATM])](https://images-assets.nasa.gov/image/S74-23458/S74-23458~orig.jpg)
