Three years after its launch, the Parker Solar Probe made its first passage through the sun's upper atmosphere. In 2018, we got a behind-the-scenes look at how NASA engineers built the probe to survive the tremendously hot journey. | NPR

On Aug. 12, NASA successfully launched Parker Solar Probe toward the Sun, where it will fly closer than any spacecraft ever has before. This week’s 10 Things blog tells you what you need to know about how this mission will uncover new secrets about our star: https://go.nasa.gov/2NoapD2 | NASA Solar System Exploration