Researchers have been arguing over the fact that the Earth was flat past few years. But the most recent is that the Universe is thought to be spherical. The concept of a flat or spherical Universe is nothing similar to that of a flat Earth. The cosmic microwave background radiations (CMB) that were left behind from the Big Bang have been found to provide some data through the observations performed by the Planck space observatory. The data suggests that the Universe might be spherical rather than flat. A few other studies showed the Universe to be closed. An object like Earth cannot return to where it started its journey from and thus, in this case, the Universe could be portrayed to be flat.
The existence of a curved Universe is acceptable as the celestial bodies in today’s era are found to rotate continuously. The local cosmological observables are affected as the Planck power spectra prefer a closed Universe. The flat Universe creates a cosmological crisis and also proves the current properties of the Universe as inconsistent. The theory of General Relativity proves mass to be curving spacetime. Thus, the entire mass present in the Universe tends to determine its shape. The Universe shows its critical density to be proportional to the square of the Hubble constant and thus, if the actual density is less compared to critical density, then the Universe will be expanding forever, which then leads to a flat and closed Universe. But, if the density is higher than the critical density, then the mass is enough to stop the expansion. The debate over the Universe’s shape is still going on and the researchers have collected a lot of evidence using the Planck observatory to prove it to be closed.
In a similar context, the astronomers have been using the Hubble Constant to represent the expansion rate of the Universe today. Lately, the closer supernovas and the explosion of gas & dust from the death of large stars are found to be another way to measure the expansion of the Universe. The dark energy is also another method that is believed to help measure the Universe. However, the researchers are now trying to unfold a few of the mysteries of the Universe.
Manuel is a former Project Assistant at an admired Astrophysics Institute. He has studied M. Sc. in Particle and Astrophysics and past experience of 4 Years there. Manuel looks after the science domain and manages articles and blogs for our organization. In free time, he prefers to attend conferences and workshops on various scientific research and studies. Manuel is brilliant with his aptitude and logical skills.