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What exactly are nebulas and do they form stars and even solar systems? Are they mostly iron?
Ty
Ty
Not quite. Most nebulae are formed of about 90% hydrogen and 10% heliumAre they mostly iron?
Well, I would say closer to 75-25, but it's just a fine point.meteor said:... Most nebulae are formed of about 90% hydrogen and 10% helium
Nebulas are large clouds of dust and gas in outer space. They are formed when gravity causes gas and dust to clump together, eventually creating a dense cloud. These clouds can be hundreds of light years across and contain various elements such as hydrogen, helium, and other trace elements.
Nebulas can have a variety of shapes and appearances depending on their location and composition. Some may appear as bright and colorful clouds, while others may be more dim and diffuse. Some may even have distinct structures and patterns, such as the famous "Pillars of Creation" in the Eagle Nebula.
Yes, nebulas play a crucial role in the formation of stars and planets. As the gas and dust within a nebula continue to clump together and accumulate, they can eventually become dense enough to form a star. Planets can also form from the leftover materials in a nebula after a star has formed.
Nebulas can be studied through various methods, such as observations from telescopes and spacecraft, as well as computer simulations. Scientists can analyze the light emitted from nebulas to determine their composition and structure, and also use other techniques to study their physical properties and evolution.
Most nebulas are not dangerous for astronauts or spacecraft. They are generally spread out over a large area, so the chances of encountering a dense cloud of gas or dust are very low. However, some nebulas may contain high-energy particles that could potentially damage equipment or harm astronauts, so proper precautions should still be taken when exploring these regions of space.