1 To be safe, USDA recommends that all pressure canners must be vented 10 minutes before they are pressurized. 2  To vent a canner, leave the vent pipe (steam vent) uncovered (or manually open the petcock on some older models) after you fill the canner and lock the canner lid in place.
There would be no place to land, and the ship would get crushed under Neptune's massive gravity, or ripped apart by its weather. To get there, we would have to build a space ship that can travel extremely fast. Then it would have to orbit Neptune or be incredibly durable to get inside of the planet. It would also need a large supply of O2, food and water.
Neptune is so far from the sun that high noon on the big blue planet would seem like dim twilight to us. The warm light we see here on our home planet is roughly 900 times as bright as sunlight on Neptune. Long Time Did you know that one year on Neptune is equal to about 165 Earth years? This fact makes Neptune the planet with the longest year. 165 Earth years is a long time, especially when we consider that the planet in second place for this title (Uranus) takes only about 84 Earth years to complete its year. The Invisible World Want to go outside and view the planets without a telescope? You can, but you won't see Neptune.