Mercury takes 88 Earth days to go around the Sun, so its year is 88 Earth days. It spins slowly, taking 58.6 Earth days. A solar day on Mercury takes 176 Earth days because of this slow spin relative to the time taken to orbit. So Venus has a sidereal day longer than its year and Mercury has a solar day longer than its year.
Wrap each potato in its own sheet of aluminum foil. Sweet potatoes can leak some of their sugar during baking despite being foil-wrapped, so transfer the wrapped potatoes to a baking sheet before they go into the oven. Baking. The time it takes to bake a sweet potato depends on the size and shape of the potatoes. Small ones should be done in about 45 minutes while medium ones take at least an hour and large ones as much as an hour and a half.
Preheat oven to 450 degrees. Line cookie sheet with tin foil. Scrub sweet potato under running water and dry well with paper towel, this prevents it from steaming rather than properly baking. Poke all over with fork, get out some aggressions! Place sweet potatoes on cookie sheet and put in oven for 30 minutes. Flip over and set timer for 30 more minutes, 20 minutes if they are smaller (shorter than your palm) Remove and scrape off any blackened crusties from the leaking juices (see picture) Let them cool a bit and cut them into portions.