The announcement will be part of a live webcast that will be available to watch on NASA TV, or you can watch the event live on Space,com, courtesy of NASA.
The Solar Probe Plus mission is scheduled to launch in the summer of 2018 and will orbit within 4 million miles (6.4 million kilometers) of the sun's "surface," where the probe will "[face]heat and radiation unlike any spacecraft in history," according to a statement from NASA.Mercury, by contrast, orbits the sun at a distance of between 28 and 43 million miles (46 and 70 million km), and the constant stream of radiation and powerful particle storms from the sun have utterly transformed that planet's surface and atmosphere.
"[Solar Probe Plus] will explore the sun's outer atmosphere and make critical observations that will answer decades-old questions about the physics of how stars work," the statement said. "The resulting data will improve forecasts of major space-weather events that impact life on Earth, as well as satellites and astronauts in space."
The speakers scheduled to participate in the webcast are: Thomas Zurbuchen, associate administrator of NASA's Science Mission Directorate; Nicola Fox, mission project scientist at the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland; Eugene Parker, a professor emeritus at the University of Chicago; Eric Isaacs, executive vice president for research, innovation and national laboratories at the University of Chicago; and Rocky Kolb, dean of the Division of the Physical Sciences at the University of Chicago.
Visit Space.com Wednesday for complete coverage of NASA's Solar Probe Plus announcement.