Welcome back, Polaris the Cepheid
  For about 100 years the amplitude of the 4-day pulsation in Polaris has decreased. We present new results showing a significant increase in the amplitude based on 4.5 years of continuous monitoring from the ground and with two satellite missions. 
H. Bruntt, A. J. Penny, D. Stello, N. R. Evans, J. A. Eaton