Space has a knack for bending our sense of scale. The Moon feels close enough to touch—after all, we see its craters with nothing but our eyes. Yet, that 238,855-mile gap between Earth and its lunar ...

On October 29, Mercury will reach its greatest eastern elongation, appearing at its farthest apparent distance from the Sun in the evening sky, as reported by Space.com and Starlust.org. At 4:28 p.m.