Twin Stars Born 500,000 Years Apart

[mickw]

Bouncing baby stars considered identical twins were oddly born 500,000 years apart, a new study finds.
The newly discovered star pair is located in the Orion nebula, a nearby "maternity ward" bustling with stellar-birth activity and located 1,500 light-years from Earth. One light year is the distance light will travel in a year, or about 6 trillion miles (10 trillion kilometers).
The astronomers who discovered the binary found that the stars show identical masses and compositions, elevating the pair to identical twin status. However, their relative brightness and other physical features differ, suggesting one star in Par 1802 formed earlier than the other.

More:   http://www.space.com/scienceastronomy/080618-identical-twins.html