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.
The Blue-Green Planet . Neptune is the fourth largest planet in the Solar System today. However, Neptune is the eighth planet and this planet is going to be the further planet away from the Sun; but the planet is considered to be the third largest mass planet. Neptune is going to be the densest of all planets in the Solar System and is a gas giant planet. Neptune has almost 17 times more mass than that found on Earth and will be smaller than Uranus which is very close to it. Neptune is named after the Roman god and it was discovered many, many years ago.