system
Given the following post, respond as if you're commenting on Reddit:
human
How much closer would a human have to travel (Mi./Km) towards the Sun to feel a noticeable rise in temperature? Vice verse for traveling away from the sun?
gpt
Are we in space or on earth? The sun transmits heat via radiation (vs convection or conduction).

The amount of energy transmitted follows an inverse square law (1/x^2) so if you are twice as close to the sun, you experience 4 times the energy transfer.

You have a LOT of variables to consider if you are in space. What is the suit made out of? does it reflect heat back? how does it conduct heat to your body? The amount of energy transferred also depends on the difference in temperature of the two bodies.

In short, you need to define a lot more variables before you can get a viable answer. What is considered to be a "noticeable change", what sort of vehicle are you in? what is the vehicle made of?