How long it would take to get to Neptune from Earth would depend on the path chosen and on where Neptune and Earth were in their orbits when the mission was launched. For example, the Voyager 2 spacecraft was launched on Aug 20, 1977 and it reached Neptune on Aug 24, 1989. So, Voyager 2 took about twelve years to reach Neptune. 1  Javascript must be enabled to use Cool Cosmos. 2  Learn how.
Most rashes caused by poison ivy, poison oak, or poison sumac are mild and last from five to 12 days. In severe cases, the rash can last for 30 days or longer. Immunotherapy is not available for allergies to poison ivy, poison oak, and poison sumac.
A. A. A. Poison ivy, poison oak, and poison sumac are plants that contain an irritating, oily sap called urushiol. Urushiol triggers an allergic reaction when it comes into contact with skin, resulting in an itchy rash, which can appear within hours of exposure or up to several days later.oison ivy, poison oak, and poison sumac can be found in most areas of the U.S., except Alaska, Hawaii, and the deserts of the Southwest. In some areas of the country (East, Midwest, and South), poison ivy grows as a vine. In the northern and western U.S., and around the Great Lakes, it grows as a shrub.