NASA's 'Mr. Eclipse' Retires but Still Chasing Shadows

Have you ever glimpsed the moon's shadow as it passes in front of the sun's disk casting a dark shadow on Earth and revealing the sun's ephemeral outer atmosphere? Have you witnessed Earth's shadow as it slowly sweeps over a full moon, taking successively bigger bites until the entire disk is red-tinged and darkly shaded? If so, then you already know the wonderment of chasing celestial