Posts

Merger of two black holes , 100 times bigger than the Sun, holds what significance — CONCERN?

Image
  Gravitational Waves: A Comprehensive Overview is    Picture this: you drop a pebble into a still body of water and observe the ripples it creates.  Envision this: right this second, waves of gravity are rippling through the very fabric of the cosmos, shattering our very idea of how the universe works.  These tiny waves, caused by massive events like black hole collisions, are allowing scientists to learn more about the cosmos.  In simple terms, this is why the recent finding of gravitational waves resulting from a merging of two enormous black holes is so intriguing.      In what ways do gravitational waves work, and what exactly are they?    Gravitational waves are created when large objects, like neutron stars or black holes, move or collide; they look like cosmic ripples in spacetime. Think of spacetime as a stretchy sheet; when anything huge, like a black hole, tugs at it, it causes waves to be emitted and propagate across the...

ROTATION OF EARTH AND SCIENCE BEHIND...

Image
  THE EARTH IS ROTATING MUCH FASTER THAN EARLIER -  MATTER OF CONCERN OR JUST SCIENCE?   REF:HANS   It would not be summer without the long days. However, when it comes to the whole astronomical day, which is a single rotation of the Earth in which the hour hand revolves twice around a regular clock, some of this year's shortest will occur in July and August. Last week saw the shortest days of the year thus far. According to data issued on July 11 by the US Naval Observatory and the International Earth Rotation and Reference Systems Service, rotation on July 9 was approximately 1.34 milliseconds shorter than 24 hours. Not every day is equal. This is not entirely abnormal. The Earth's rotations have been faster than usual recently. Over the last decade, the average day has decreased significantly, and in the last five years or so, the whole cycle has frequently been less than 24 hours long. Factors influencing the change include motions at the Earth's core, atmospheri...