In living color Additional resources Bibliography A nebula is a giant cloud of gas and dust located in the space between stars. Nebula is Latin for "mist, vapor, fog, smoke, exhalation," but in an astronomical context, it refers to any celestial object that appears cloud-like when view...
Emission Nebulae are those that emit radiation from ionized gas and are often called HII regions because they are largely composed of ionized hydrogen. The Orion Nebula is an emission nebula and star-forming region. Not only is it thebrightest nebulain our sky, but it is also the most active...
We present Gunn r, I, and [SII] images of the variable PV Cep nebula, and longslit spectroscopy taken between 1989 and 1994. The variations in brightness and color are probably due to variable extinction by dust in the wind of PV Cep, implying strong variations of its mass loss rate.Thi...
The opposite case is an emission nebula where you want the nebula in false color (for example the Hubble SHO palette) but you want RGB stars. In that case the narrowband filters are the primary subjects - you only do RGB, or LRGB for the stars. This can look nice because it prevents ...
The problem with ionization nebulae like the so-called Pillars of Creation (or planetary nebulae like the Southern Ring Nebula) is that the light is produced by fluorescing gases, meaning it has an emission line spectrum, which screws up the color reproduction when regular RGB filters are used...
No matter what it looks like from the outside looking in, deep sky astrophotography is not about what gear you have. It’s about the journey you take on the way to achieving the image you’ve always wanted to capture. The Trifid Nebula captured using a Canon EOS Ra camera and telescope...
Where things get tricky are a few targets that have both Emission and Reflection nebula, (for example the Flaming Star nebula), the reflection nebula is possible, but not easy to include. Etoimos, on 03 May 2023 - 7:16 PM, said: ...
Here’s a picture of a “Green Ring” Nebula; the NASA press release is worth a read for thehilarious Green Lantern references. But besides the science fiction, there is some neat science in action here: “The green color represents infrared light coming from tiny dust grains called polycycli...
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If you get just one nebula filter, this type you should get. All the varieties of emission nebulae are helped. There is a wide range of bandwidths in this category, with wider ones providing less contrast, but also brighter images.