Note: 1,000 career games played are needed to make this list of the one-thousand greatest on base plus slugging leaders, raw averages are presented in parenthesis to further distinguish the top one-hundred, and a bold faced entry denotes that the player was active during the previous Major League season.
Primary active transport, directly uses metabolic energy (ATP) to transport molecules across a membrane.
Generally stars spend most of their active lives travelling through the stage of stellar life-cycle known as the. Main Sequence. I say 'active' life because the remnants of dead stars can persist more or less indefinitely, slowly fading into obscurity. I say 'generally' because even dead stars sometimes find ways to obtain new life (see stellar accretion for example). Main sequence stars fall into several spectral classes, as shown above. Going from top left to bottom right we have, a small dim red dwarf (spectral class M), an orange dwarf (spectral class K) a yellow dwarf, like the Sun