posted by Andrew .
How might they use spectroscopy to deter-
mine the atmospheric composition of these
1. None of these
2. By analyzing the spectrum of the surface
of the planets.
3. All of these
4. By analyzing the molecules that compose
5. By analyzing the spectrum of the atmosphere
sphere of the planets.
6. By analyzing the atoms that composed the planets
I would go with 5, but that is very misleading. How one does that is tricky, you do it by measuring absorbtion of light.