Wireline Operations. This is part of the Oil and Gas Production Series. Many of todayâs most vital oilfield operations depend directly on the use of wireline, a strong, thin length of wire cable mounted on a powered reel. Wireline is particularly important during completion and production. Field operators can run anything from a basic downhole directional survey to the most delicate gamma ray formation log on wireline.
The first modern solution of general relativity that would characterize a black hole was found by Karl Schwarzschild in 1916, although its interpretation as a region of space from which nothing can escape was first published by David Finkelstein in 1958.
The first Planetary Nebula to be discovered was the Dumbbell Nebula (M27), but I think the Crab Nebula (M1) was discovered earlier-this is a supernova remnant.he Andromeda Galaxy was called the Andromeda Nebula before this. Back to the actual answer, the first nebulae were found and cataloged by Charles Messier in the 18th century.