One paper claims that the flyby anomaly only exists because NASA scientists forgot about the transverse Doppler effect. If that's true, why is it still called an anomaly? Why isn't everyone banging their heads on walls and thinking, "D'oh! I can't believe I forgot about that!"? If it's not true, did the paper's authors make a mistake? According to the Wikipedia article on the flyby anomaly, under the "Possible explanations" section: "Unaccounted Transverse Doppler effect, i.e. the redshift of light source with zero radial and non-zero tangential velocity. However, this cannot explain the similar anomaly in the ranging data, or the possibly related Pioneer anomaly." What ranging data? Why don't other websites mention it? I'm quite confused.