SAASST News

Saturday, 16 January 2021 12:54

Nobel Prize in Physics. A Lecture by Dr. Antonios Manousakis

Dr. Antonios Manousakis, from the Department of Applied Physics and Astronomy, and a research fellow at the Sharjah Academy for Astronomy, Space Sciences, and Technology, gave a general lecture on "The Nobel Prize in Physics" on Jan. 13, 2021, as part of SAASST biweekly lecture. He pointed out that the Nobel Prizes are a set of five prizes given in the following fields: Physics, Chemistry, Medicine, Literature, and Peace. According to Alfred Nobel's will,

these prizes are awarded "to those who, during the preceding year, have conferred the most significant benefit to humankind. The Peace Prize is given "to the person who has done the most or best to advance fellowship among nations, the abolition or reduction of standing armies, and the establishment and promotion of peace congresses. The Nobel Prizes are widely regarded as the most prestigious awards available in their respective fields.

Dr. Antonios elaborated on the Nobel Prize in Physics for 2020.  The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Physics 2020 with one half to Roger Penrose "for the discovery that black hole formation is a robust prediction of the general theory of relativity," and the other half jointly to Reinhard Genzel and Andrea Ghez "for the discovery of a supermassive compact object at the center of our galaxy."

Roger Penrose used ingenious mathematical methods to prove that black holes are a direct consequence of Albert Einstein's general theory of relativity. Einstein did not believe that black holes exist; these super-heavyweight monsters that capture everything that enters them. Nothing can escape, not even light.

In January 1965, ten years after Einstein's death, Roger Penrose proved that black holes really could form and described them in detail; at their heart, black holes hide a singularity in which all the known laws of nature cease. His groundbreaking article is still regarded as the most important contribution to relativity's general theory since Einstein.

Reinhard Genzel and Andrea Ghez each lead a group of astronomers that, since the early 1990s, has focused on a region called Sagittarius A* at the center of our galaxy. The orbits of the brightest stars closest to the Milky Way's middle have been mapped with increasing precision. These two groups' measurements agree, with both finding an extremely heavy, invisible object that pulls on the jumble of stars, causing them to rush around at dizzying speeds. Around four million solar masses are packed together in a region no larger than our solar system.

Using the world's largest telescopes, Genzel and Ghez developed methods to see through the vast clouds of interstellar gas and dust to the Milky Way center. Stretching the limits of technology, they refined new techniques to compensate for distortions caused by the Earth's atmosphere, building unique instruments and committing themselves to long-term research. Their pioneering work has given us the most convincing evidence yet of a supermassive black hole at the center of the Milky Way.