In corn, purple kernels (P) are dominant to yellow kernels (p). You have a plant with an unknown genotype that has a phenotype of purple kernels. You perform a testcross and find that all of the offspring are purple.
The layout of the solar system, including the Oort Cloud, on a logarithmic scale. Credit: NASA. In the furthest reaches of the Solar System is the Oort Cloud; a theorized cloud of icy objects that could orbit the Sun to a distance of 100,000 astronomical units, or 1.87 light-years away.
How big is the Milky Way Galaxy? The Milky Way Galaxy is our home in the existing Univers, it is a barred spiral galaxy 100,000â120,000 light-years in diameter containing 200â400 billion stars and at least as many planets including our solar system.