Different gas is picked up by different filters in images. Oxygen is a blue filter for example. When capturing deep space objects a camera like a ZWO has set filters or filters to add to be able to image the gas. It is then stacked in hundreds of images to create deeper gas pronunciation. This is then tinkered with in a photo imaging application like photoshop.
Click_Click_Broooom t1_j43yd46 wrote
Reply to What causes the different colors and cloud effect in nebulas? by tackleberry2219
Different gas is picked up by different filters in images. Oxygen is a blue filter for example. When capturing deep space objects a camera like a ZWO has set filters or filters to add to be able to image the gas. It is then stacked in hundreds of images to create deeper gas pronunciation. This is then tinkered with in a photo imaging application like photoshop.