they not only contain H2 and helium.they also contain dust particles,gases & some asteroids which make them visible.
R.S.SRIRAMGOPAL
The opposite of visible is invisible, meaning unable to be seen.
If the gas is hydrogen and is lit, the flame will be colorless and almost invisible. This is because hydrogen burns cleanly without producing a visible flame.
Visible energy refers to the forms of energy that are easily detectable by our senses, such as light and heat. Invisible energy includes forms like electromagnetic radiation, radio waves, and gravitational forces that are not directly perceptible to us but still play crucial roles in the functioning of the universe.
invisible imitation
Ionization nebulae are bright because they are composed of ionized gas that emits light as electrons recombine with positively charged ions. This process releases energy in the form of visible light, making the nebulae appear luminous. Additionally, the presence of hot, young stars in these nebulae contributes to their brightness by providing energy to ionize the gas.
visible
Only if you are a Ghost you can get invisible. But it's automatic, you are invisible unless you are hit or take damage your allies are visible to you, and you are visible for them.
The base word of "invisible" is "visible."
more invisible, most invisible
Visible.
Invisible gas does not fit into the categories of metal or nonmetal. It is a state of matter that refers to gases that are not visible to the naked eye. Many elements in the periodic table can exist in the form of invisible gases, such as hydrogen, oxygen, nitrogen, and carbon dioxide.
to become invisible to bad you go to the glasses shop an get an invisible suit than put on and you invisible, but to be visible you take off the suit