NASA will send a spacecraft on a mission to get a closer look at the sun.
The Parker Solar Probe, named after American solar astrophysicist Eugene Parker, will fly closer to our star than any other man-made object.
The car-sized probe, which will get within 3.9million miles of the sun’s surface, is set to blast off from Cape Canaveral, Florida, on Saturday at 8.33am British time. It is expected to approach the sun in 2024.
Scientists hope to unlock mysteries such as why the sun’s corona, the outermost layer of its atmosphere, is hotter than its surface.
The spacecraft will orbit the sun 24 times – sampling the solar wind and providing close-up observations – while enduring temperatures of 1,377C (2510F).
A heat shield made using carbon composite coated with ceramic will protect it from the extreme conditions, Nasa says.