That's a great question! While NASA hasn't sent a probe to land on the Sun (it's a giant ball of fire!), they have sent missions to study it up close.

Here are a few notable examples:

* Parker Solar Probe: Launched in 2018, this spacecraft is designed to fly through the Sun's corona (outer atmosphere), making it the closest human-made object to our star. Its primary goal is to study the Sun's magnetic field and energy flow.

* Solar and Heliospheric Observatory (SOHO): This spacecraft, launched in 1995, orbits the Sun at a point between Earth and the Sun. It provides continuous observations of the Sun and its activity, including solar flares and coronal mass ejections.

* Solar Dynamics Observatory (SDO): Launched in 2010, SDO observes the Sun in multiple wavelengths of light, providing high-resolution images and data on its magnetic field and activity.

So, while we haven't landed on the Sun, we are sending spacecraft to get closer than ever before and learn more about this fascinating celestial object.