Whenever the subject of mosquito control comes up, someone gives a fervent argument for installing purple martin houses and bat houses. Stores that cater to bird enthusiasts often tout the purple martin houses as the best solution for keeping your yard mosquito free.
A short period comet is conventionally defined as a comet having an orbital period of less than 200 years. What is the maximum possible aphelion distance for a short period comet with a perihelion of 0.5 AU? Where does this place the comet relative to the outer planets? (3)
Halley's comet takes 76 years to orbit the Sun, so it is in the neighbourhood of Earth for about a year or so.alley's comet passes near the Earth every 75-76 years. It then passes very close to the Sun then far out past Pluto's orbit, meaning it has a very eccentric orbital path.