Question

The Orion nebula, M42, is a hot, thin cloud of glowing gas, so its spectrum is: 1) a few bright lines against a dark background. 2) a few dark line in the continuum. 3) a continuum, but with both bright and dark lines mixed in. 4) a continuum, strongest in the color red. 5) not in the visible portion of the spectrum.

Answer 1

1) a few bright lines against a dark background.

Step-by-step explanation:

The Orion nebula is in vast space, not surrounded by anything remotely luminous. Everything around it is pitch black. Hence, in a distance, it appears to be a small bright light in vast space.