Fe k line

In the vast expanse of space so grand, There's a spectral peak, oh how it's planned, It's called the K-line, shining so bright, Revealing stars' secrets, day and night. Iron is the element it's tied to, At around 6.4keV, it shines through, With L-line by its side, they dance and play, Observing the light in a magical way. NASA, oh NASA, what have you found? Using Suzaku and XMM-Newton, renowned, Black holes spinning, oh what a sight, Clocking their speed, with all your might. X-ray emissions, so broad and wide, Near the event horizon, they reside, MCG-6-30-15 and MCG-5-23-16, Super-massive black holes, a cosmic dream. Einstein's theory, it rings so true, General relativity, a breakthrough, Andrew Fabian and James Reeves, Leading the teams, among the cosmic seas. Random page: TJ Grant