When NASA launched the Pioneer probes, they were met with an intriguing mystery. At around 20 astronomical units, both spacecraft began accelerating towards the Sun.

NASA’s IMAP spacecraft studies charged particles, energetic neutral atoms, and magnetic fields at the heliosphere’s boundaries, providing real-time space weather data for Earth and spacecraft.

“The radio signature is exactly what we’d expect from a water-rich comet,” said one of the researchers, which captures the essence of the dualism of discovery and explanation that characterizes the ...

Three NASA missions are set to launch on a single SpaceX Falcon 9 rocket to study the Sun's influence. The primary mission, IMAP, will travel one million miles from Earth to study the heliosphere and ...