Sending a lander to Venus presents several huge engineering problems.
The first color pictures taken of the surface of Venus by the Venera-13 space probe. The probe lasted only 127 minutes before succumbing to Venus's extreme environment. presents several huge engineering problems. Granted, we'd get a break from the nail-biting entry, descent, and landing, since Venus' atmosphere is so thick a lander would settle gently to the surface like a stone settles in water – no sky cranes or retrorockets required.
But there's one additional challenge that might be close to being solved: creating batteries that can operate long enough in Venus' hellish conditions to make a lander mission worth the effort. While the battery is still in development, engineers are encouraged that tests conducted demonstrate that these types of batteries are capable of operating in harsh environments like on Venus.
Batteries appear to be the only solution for powering a Venus lander. Solar panels are not viable due to surface light levels being comparable to an overcast day on Earth, and current solar panel designs would not withstand the high surface pressures. A radioisotope thermoelectric generator requires bringing a heat source to the surface of Venus, and since heat management is already a major mission challenge, this method is not a good option.
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