Artist's illustration of the Parker Solar Probe sweeping past the Sun. A special issue of the Astrophysical Journal Supplement Series (ApJS) features nearly 50 articles detailing early science results from this mission to explore the Sun's outer atmosphere — the corona — and to elucidate the origin of the solar wind, the stream of energetic particles that flows off the Sun and pervades our solar system. Learn more at AAS Nova. [NASA, Johns Hopkins APL, Steve Gribben]