31. ? Phoenicis is a spectroscopic binary and a small amplitude variable star. 32. Using chromatography and spectroscopic methods, as well as others. 33. Spectroscopic observations of the Sun and photometric observations of stars were initiated.34. Spectroscopic observations in the 1900s gave the first clues about the Venusian rotation.35. Figure 1 ( b ) illustrates this transition with the corresponding spectroscopic notation. 36. Spectroscopic observations show that all planetary nebulae are expanding.37. Spectroscopic studies have provided detailed measurements of the nucleus.38. The exact composition may be determined by spectroscopic studies. 39. Spectroscopic examination revealed that it was mostly tar and nicotine from tobacco smoke.40. MASINT chemical and spectroscopic sensors could determine its propellant.
