I will admit to being bothered by sensational terminology in astronomy.
Gas and dust clouds in Tentacles of the Tarantula Nebula/30 Doradus/NGC 2070 have been sculpted into elongated shapes by powerful stellar winds (streams of charged particles) and ultraviolet light from these hot cluster stars. These clouds are what is left from the enveloping hydrogen gas cloud in which the stars were born.
Besides sculpting the gaseous terrain, the brilliant stars can also help create a successive generation of offspring. When the winds hit dense walls of gas, they create shocks, which may be generating a new wave of star birth.
Our solar wind is our example of a stellar wind.
The solar wind is a stream of charged particles released from the upper atmosphere of the Sun, called the corona. This plasma consists of mostly electrons, protons and alpha particles with kinetic energy between 0.5 and 10 keV. The solar wind varies in density, temperature and speed over time and over solar latitude and longitude.
A gas cloud cannot have a dense wall. A stellar wind of subatomic particles having high kinetic energy does not create substantial shocks. I assume over time these energetic particles would gradually move something but not in an abrupt shock.
Ultraviolet light does not sculpt clouds.
Laser beam machining (LBM) is a non-traditional subtractive manufacturing process, in which a laser is directed towards the work piece for machining. This process uses thermal energy to remove material from metallic or nonmetallic surfaces. The high frequency of monochromatic light will fall on the surface then heating, melting and vaporizing of the material take place.
This process 'can produce precisely vertical walls.'
This focused beam of monochromatic light using thermal energy to melt and vaporize material is not like the unfocused broad spectrum light, including UV, from stars at some distance.
If the light from the stars gradually warms the clouds the result should be random, not with sculpted edges for an amorphus cloud. Perhaps the 'hydrogen cloud' is ionized hydrogen. and is under the influence of EM fields; then it could exhibit some structure, like an edge.
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