We obtained spectra , in the wavelength range \lambda = 995 - 1769 nm , of all four known planets orbiting the star HR 8799 .
Using the suite of instrumentation known as Project 1640 on the Palomar 5-m Hale Telescope , we acquired data at two epochs .
This allowed for multiple imaging detections of the companions and multiple extractions of low-resolution ( R \sim 35 ) spectra .
Data reduction employed two different methods of speckle suppression and spectrum extraction , both yielding results that agree .
The spectra do not directly correspond to those of any known objects , although similarities with L and T-dwarfs are present , as well as some characteristics similar to planets such as Saturn .
We tentatively identify the presence of CH _ { 4 } along with NH _ { 3 } and/or C _ { 2 } H _ { 2 } , and possibly CO _ { 2 } or HCN in varying amounts in each component of the system .
Other studies suggested red colors for these faint companions , and our data confirm those observations .
Cloudy models , based on previous photometric observations , may provide the best explanation for the new data presented here .
Notable in our data is that these presumably co-eval objects of similar luminosity have significantly different spectra ; the diversity of planets may be greater than previously thought .
The techniques and methods employed in this paper represent a new capability to observe and rapidly characterize exoplanetary systems in a routine manner over a broad range of planet masses and separations .
These are the first simultaneous spectroscopic observations of multiple planets in a planetary system other than our own .