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.
It's 2.7 billion miles to Neptune, or 4 hours traveling at the speed of light. While Pluto isn't officially a planet, it would take roughly the same to reach Pluto as Neptune since they are sometimes the same distance away. The New Horizons spacecraft will reach Pluto around July 2015, after traveling a total of 9.5 years. Written Jul 11, 2014 Â· View Upvotes Â· Answer requested by 1 person.