Metalloids have properties of both metals, and non metals. Metal has luster, and a nonmetal cannot be pulled into a wire, therefore it has traits of both a metal and a nonmetal, making it a metalloid.
After the Big Bang happened, the universe is constantly expanding. The Universe has expanded for around 13.7 billion years. The further a galaxy is, the faster it would move away from Earth. This principle is called the conservation of momentum.
