In 1841, before the publication of his first paper, he asked questions relating to solar heat, in a letter to Baur, “Is it the glowing of the sun? Why does he not cool off? Is it a burning ...

The Parker Solar Probe, traveling at 430,000 mph, reaches 3.8 million miles from the Sun. Scientists now wait for a signal ...

NASA said scientists began receiving more detailed telemetry — or "housekeeping data" — from the spacecraft on New Year's Day.