Department of Homeland Security. The agencies slated to become part of the Department of Homeland Security will be housed in one of four major directorates: Border and Transportation Security, Emergency Preparedness and Response, Science and Technology, and Information Analysis and Infrastructure Protection.
On the H-R diagram, stars are not uniformly distributed. The  main-sequence stars appear in decreasing order, from hotter, more  massive blue stars to cooler, less massive râ¦ed stars. The stars nearest to Earth are not very bright, and thus appear at the bottom right of the H-R diagram, instead of the top of the diagram like the brightest stars.
Figure 14.5 Variable Stars on HR Diagram Pulsating variable stars are found in the instability strip of the HR diagram. As a high-mass star evolves through the strip, it becomes a Cepheid variable.Low-mass horizontal-branch stars in the instability strip are RR Lyrae variables.igure 14.5 Variable Stars on HR Diagram Pulsating variable stars are found in the instability strip of the HR diagram. As a high-mass star evolves through the strip, it becomes a Cepheid variable.