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Most every morning now, Tom found his way outside to the rocker to watch the sun rise. The first piercings of morning amethyst and pink inevitably brought joy, as did the frogs and birds chirping in the distance, chatting the morning news of coming winter. And the old broken chinaberry tree stared at Tom. It had been hit by lightning years earlier but stood still against the backdrop of the oaks and willows stretching down the riverbank. In the blue fog, the deformed old tree took the shape of a looming giant, a dark presence draped in Spanish moss reaching down as if a dutiful matron...

Most every morning now, Tom found his way outside to the rocker to watch the sun rise. The first piercings of morning amethyst and pink inevitably brought joy, as did the frogs and birds chirping in the distance, chatting the morning news of coming winter. And the old broken chinaberry tree stared at Tom. It had been hit by lightning years earlier but stood still against the backdrop of the oaks and willows stretching down the riverbank. In the blue fog, the deformed old tree took the shape of a looming giant, a dark presence draped in Spanish moss reaching down as if a dutiful matron...

This work provides the current theory and observations behind the cosmological phenomenon of dark energy. The approach is comprehensive with rigorous mathematical theory and relevant astronomical observations discussed in context. The book treats the background and history starting with the new-found importance of Einstein's cosmological constant (proposed long ago) in dark energy formulation, as well as the frontiers of dark energy.

The authorsdo not presuppose advanced knowledge of astronomy, and basic mathematical concepts used in modern cosmology are presented in a simple, but...