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.
Report Abuse. Can't land-Jupiter, Saturn, Neptune, Uranus are all gas giants-essentially, chemically they're almost like huge balls of farts. Theres a theory that the core may be metallic hydrogen-theres no evidence to support this speculation but its good solid speculation.t does not take too long... and it is not all gas The problem with landing on Jupiter would be its terrible gravity that would crush us long before we got anywhere near something we could land on. It is a huge planet with storms raging .....