Nebulae can be difficult to detect due to their vast distances from Earth and their often faint luminosity. Many nebulae are composed of diffuse gas and dust, which can obscure them from view, especially if they are located within the plane of the Milky Way. Additionally, some nebulae emit only in specific wavelengths, such as infrared or radio, requiring specialized instruments to observe them effectively. This combination of factors makes identifying and studying nebulae a challenging task for astronomers.
Emission nebula glow and reflection nebula reflect the light form other stars
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An absorption nebula is a dark nebula, which absorbs all incident radiation without reemission.
The Crab Nebula is located within the constellation of Taurus. It is approximately 6,500 light-years away from Earth. The Crab Nebula is the remnant of a supernova explosion observed in 1054 AD.
Another popular nebula is the Eagle Nebula, also known as Messier 16. It is located in the constellation Serpens and is famous for the "Pillars of Creation," which are towering columns of interstellar gas and dust where new stars are forming.
A new star will usually have hydrogen alpha light. This light is red but is difficult for the human eye to detect. If you look up M42, the Great Orion Nebula, most long exposure photographs will show this red light.
Because nebula, like galaxies, do not have a defining edge, it is difficult to determine the exact size but an estimate is the closest you'll get.However, in this case, the difference is large enough.The Tarantula Nebula is about 15 times larger than the Carina Nebula.Tarantula ~ 1,000 light years acrossCarina ~ 65 light years across.
Radon is a gas, odorless and colorless. But with the appropriate equipment the detection of radon is possible and not so difficult.
nebula
They probably don't cross them enough.
The Stingray Nebula (Hen 3-1357) is a planetary nebula. (The youngest known).
Most viruses are too small to be seen with a light microscope because they are smaller than the wavelength of visible light. This makes it difficult to detect them using this method.
"The Crab" is a nebula.
a type of nebula
A cloud in outer space consisting of gas or dust and planetry nebula is one of the types also called ring nebula or A planetary nebula is an emission nebula consisting of a glowing shell of gas
Emission nebula glow and reflection nebula reflect the light form other stars
The Helix Nebula is a planetary nebula located in the constellation Aquarius, while the Ring Nebula is a planetary nebula located in the constellation Lyra. The Helix Nebula appears more like a disk or helix shape, while the Ring Nebula appears as a ring or donut shape due to its orientation.