IIRC some designs have an airship with probe on a long cable. The airship stays in the relatively cool upper layers of the atmosphere and periodically lowers th

IIRC some designs have an airship with probe on a long cable. The airship stays in the relatively cool upper layers of the atmosphere and periodically lowers the probe to study the surface for a short while. That way you can cool the probe down every time you reel it in instead of making it withstand the hellish temperatures for extended amounts of time.