How will you overcome these challenges with the design of your spacecraft?

(I decided to choose the inner planet mercury)

I put:

Mercury is very different than Earth. It’s far rougher than earth; the main problem is the temperature. Humans can’t just live there without the proper equipment like we do here on earth. Since the temperature on Mercury is 426C and 800F I chose these items to include in my space craft to overcome the temperatures.

I’d include
Reinforced carbon–carbon (RCC)
Fibrous refractory composite insulation (FRCI) tiles
NASA's Orion deep-space capsule

what else should I include?

To further overcome the challenges of designing a spacecraft for Mercury, you may consider including the following:

1. Heat-resistant materials: In addition to the RCC and FRCI tiles mentioned, you could also include other heat-resistant materials such as ceramic composites or ablative thermal protection systems. These materials help mitigate the extreme heat on Mercury's surface.

2. Advanced cooling systems: Since maintaining a habitable environment is crucial, incorporating advanced cooling systems within the spacecraft would be essential. Efficient radiators, heat pipes, and active cooling methods using liquid coolant or cryogenic systems can help regulate the temperature inside the spacecraft.

3. Insulation: To minimize thermal conductivity and heat transfer between the spacecraft's exterior and interior, effective insulation should be used. Materials with low thermal conductivity, like aerogels or vacuum-insulated panels, could help in this regard.

4. Energy generation and management: Given the scorching temperatures on Mercury, it would be vital to have robust energy generation systems. Consider including advanced solar panels or other power generation technologies capable of withstanding high temperatures. Additionally, efficient energy management systems, such as advanced batteries or power storage methods, would ensure a reliable power supply throughout the mission.

5. Radiation protection: Mercury is exposed to intense solar radiation due to its proximity to the Sun and the lack of a significant atmosphere. Designing shielding systems using materials with high radiation absorption capabilities, such as polyethylene or lead, can help protect the crew and equipment from harmful radiation.

6. Navigation and communication: Mercury's proximity to the Sun can cause communication issues due to increased solar interference. To overcome this challenge, you would need to incorporate advanced navigational systems and robust communication equipment that can withstand interference and facilitate efficient communication between the spacecraft and Earth.

These additional features, among others, will help you address the unique challenges presented by Mercury's environment and enhance the spacecraft's overall design for a successful mission.