A star is a large ball of gas that emits energy produced by nuclear reactions in the star's interior. Much of this energy is emitted as electromagnetic radiation, including visible light. Light emitted by stars enables other objects in the universe to be seen by reflection.
The standard weights and meters scale for every two years because they may raise some errors due to regular use
The measuring device on regular and continous use may loose their standards and results in some error
The national standards body National Bureau of Standards & Metrology (NBSM) verifies the standard weights and meter scales for every two years
There are also some other factors which can contribute to bring error in the measurement of instruments
Yes. Either way though, humans have more chromosomes than any other species.
Ernest Rutherford
don't know the age sorry
