To solve Biggest Space Mystery ever, NASA deploys Hubble Space Telescope

tech.hindustantimes.com:

The NASA Hubble Space Telescope has spent 3 decades in space acting as the Earth’s watchdog and explorer of the universe. In its time spent observing distant galaxies and stars, it has also collected important information about the world which has helped scientists break records and reach new milestones. And now, Hubble is going to take on its toughest challenge yet. The NASA space telescope has been entrusted with measuring the expansion rate of the universe. What is it and why is it one of the biggest unsolved mysteries of the universe? Read on to find out. Also read: A gigantic 3,400-feet wide 'potentially hazardous' asteroid is headed towards the Earth

The popular theory about the origin of the universe is the Big Bang theory. The theory suggests that at the beginning of time, the universe was a dense "substance" which contained all the matter that has created the stars, planets, galaxies and the entire universe since then. At some point in time a huge explosion occurred which resulted in the birth of the universe. However, because the universe came into existence as a product of an explosion, it is constantly in motion- outwards. But it is not moving in a random direction, all things in the universe are actually moving away from each other like particles emerging from a single point explosion do.

So, if this theory is to be believed, the universe should be expanding continuously as all the particles, which are the stars and the galaxies, are moving away from each other. And the expansion rate of the universe is the way to prove it all. According to the current theory, the rate of expansion of the universe should about 67.36 kilometers per second per megaparsec (a megaparsec equals 3.26 million light-years). But