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.
Instructions. 1  1. Preheat oven and wash the sweet potatoes: Preheat oven to 375Â°F. 2  3. Prick with a fork, wrap, and roast: Prick each sweet potato several times with a fork and wrap loosely in the foil. 3  4. Check for doneness: Depending on the size of your potatoes, it may take between 30 minutes to 1 hour for them to be done. Check at 30 minutes by squeezing one of the potatoes in a oven mitt protected hand and inserting a sharp knife or fork into the center. They should feel quite soft and the knife should easily glide all the way through. If not return to the oven and check again in 10 minutes.