Basics of Physics

Standard Kilogram Metal The international standard kilogram   is the metal object carefully enclosed w ithin these nested glass containers.  

Universe and Time A new theory proposes that time is a fundamental property of the Universe governed by an oscillator that interacts with all matter and energy. Theorists have determined 10^(-33) seconds as the upper limit for the period of a universal                      oscillator, which could help in constructing a quantum theory of gravity.                                                                                                                                        –Katherine Wright Katherine Wright is a Senior Editor of Physics.

The definition of the tropical year   The tropical year is defined as the time interval between two successive passages of the earth through the vernal equinox, which takes place approximately on March 21st  each year. It may also be defined as 1/86,400 of the mean solar day, which is the time interval between two successive passages of a point on the earth in front of the sun average over one year. But this definition has the drawback that, because of tidal action the period of earth's rotation is decreasing gradually, and therefore this unit should also be changing gradually.

  The standard meter and the standard kilogram This is a bar of platinum-iridium alloy of X-shaped cross-section called standard meter and this is the International Standard of Length .  The other thing is a cylinder of platinum-iridium called the standard kilogram and this is the International Standard of Mass .

The Oak Ridge National Laboratory (ORNL) This is the Oak Ridge National Laboratory research nuclear reactor, Which is being used in a great variety of fundamental research.  

Great Nebula in Andromeda This is Great Nebula in Andromeda, also called M - 31. The nearest of the large regular Galaxies, It is about 2.5 Million light-years or 2.5 * 10^22 m  from the solar system. Its diameter is about 1.25 Million light years and It contains more than 10^11 stars.