Connect with us

science

Cosmic clocks reveal that time was 5 times slower at the dawn of the universe | Science

Published

on

Cosmic clocks reveal that time was 5 times slower at the dawn of the universe |  Science

If you were there, when the universe was born, a second would seem like a second to you, but to us now, 12 billion years later, that initial time would seem to pass very slowly.

Albert Einstein’s theory of general relativity was a turning point in physics in general, and it caused a quantum leap in astronomy and theoretical physics, and it changed the basic concepts of time, space, mass, and energy, making time and space a unified matter. , and creates the concept of time depending on the speed of objects and the intensity of gravity with which they move. Physicality, contraction and expansion of time has become a fundamental concept for understanding the universe.

Although the theory of general relativity underlies astrophysics and cosmology, scientists have not been able to prove the basic premise of the alleged theory of relativity: due to the expansion of the universe, we should see time pass. As the dawn of the universe unfolds, researchers have tried to track it very slowly. However, the way to track these deep-time events has been a difficult dilemma to solve.

Today, scientists have for the first time found a solution to this puzzle, using quasars (quasars) as “clocks” to observe the dilation of time, and they have published their results. Their research This is Natural Astronomy on July 3rd.

Albert Einstein’s theory of relativity changed fundamental concepts in physics such as time, space, mass, and energy (Shutterstock).

Time dilation and quasars

To put it simply, Geraint Lewis, the study’s principal investigator and a professor in the School of Physics and Sydney Astronomical Society at the University of Sydney, explains in a press release published by York Alert (EurekAlert) – “If you were there, when the universe was born, a second would seem like a second to you, but to us now, over 12 billion years, that early time would seem to pass very slowly.”

See also  "Body language and psychology" experts resolve the controversy over the origin of Maher's last hope

It can be compared to an ambulance whistle that sounds normal as it passes you and then gets louder as it moves away from you. In this analogy, the ambulance is a distant galaxy and the light emanating from it is a siren. At the source of the light, the emission is normal, but in our view, it expands because the galaxy is far away from our location. .

Professor Lewis and his co-author Dr Brendan Brewer of the University of Auckland used data observed from nearly 200 quasars, the supermassive black holes at the centers of early galaxies, to analyze this time dilation.

Previously, astronomers could confirm this slow motion of the universe over a time horizon equal to roughly half the age of the universe using supernovae (massive exploding stars) as “standard clocks.” Observe them at the enormous distances required to see the universe. But by observing quasars, the time horizon we can see has receded to only about a tenth of the universe, confirming that the universe appears to be accelerating as it ages.

Fireworks display

“While supernovae behave like single flashes of light (making them easier to study), quasars are more complex, like a continuous firework display,” Professor Lewis says. “What we’ve done is unravel this fireworks display and show that quasars can also be used as stable markers of time.” In the Early Universe”.

Professor Lewis worked with astrophysicist Dr Brewer to study the details of 190 quasars observed over two decades and was able to combine observations made in different colors (or different wavelengths: green light, red light, infrared) to rank the ‘beats’. Each of the quasars, and by using Bayesian inference (a type of statistical inference that uses the Bayes factor to generate an estimate of the probability of a hypothesis given the discovery of new evidence), they found that the expansion of the universe was imprinted. On the “beats” of each quasar.

See also  Heavy rain, high fog... Here's the weather forecast for the start of the week

Professor Lewis says, “With this amazing data, we were able to chart the pulses of quasar clocks and reveal the effect of the expansion of space.” These results confirm Einstein’s theory of the expansion of the universe, but contradict earlier studies that failed. To determine the time dilation of distant quasars.

Professor Lewis continues, “Those previous studies made people question whether quasars were really cosmic bodies or whether the broader concept of space was correct. But with this new data and analysis, we were able to observe. Quasars were difficult to observe, and we found that they behave exactly as Einstein’s relativity predicted.”

Continue Reading
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

science

What are the most common symptoms of breast cancer in men?

Published

on

What are the most common symptoms of breast cancer in men?

Breast cancer is a disease that affects women, especially with a high number of infections, but in fact it affects men as well, and many believe that it leads to death among them.

she explained NHS The NHS in England says that 85 men die each year in Britain from breast cancer, and that the malignancy affects around 400 men annually.

The charity Breast Cancer Now also reports that “at least one person is diagnosed with the disease every day”.

According to the website “Mayo ClinicMedically, male breast cancer is “a rare cancer that begins with the growth of cells in the breast tissue of men.”

Breast cancer cells disrupt the immune system

Australian researchers announced Monday that breast cancer cells have powerfully destroyed the body’s immune system, allowing the disease to invade patients’ bones.

“Breast cancer in men usually affects older people, but it can occur at any age,” he pointed out.

Those diagnosed with “male breast cancer” at an early stage have a good chance of recovery.

What are the symptoms?

The symptoms of this disease are as follows:

A painless lump or thickening of breast tissue and changes in the skin of the breast, such as sagging, wrinkling, redness or peeling.
Changes in the nipples, such as redness or peeling, or one of the nipples turning inward.

The causes of these malignant tumors are still unclear, but doctors define “male breast cancer” as occurring when “some breast cells divide faster than healthy cells.”

Accumulated cells form a tumor, which can spread (metastasize) to nearby tissues, lymph nodes, or other parts of the body.

See also  "Holding" wants to establish the largest health site in the United Arab Emirates "Pure Health"

According to the website “Web MedicineThe disease can be diagnosed through a clinical examination, which is done by feeling the chest area of ​​the person in search of any tumors or changes in the chest tissue, and the doctor evaluates the size, structure and depth of the tumors present.

It can be diagnosed with radiographic imaging such as X-rays or ultrasound to create clear images of the breast tissue.

Only a biopsy is used to “confirm” a diagnosis of breast cancer in men. This is done by taking a sample of the tumor tissue and examining it to confirm whether the tumor is cancerous or benign.

Treatment usually involves surgery to remove as much of the visible tumor as possible, along with some of the surrounding healthy tissue.

Other treatments such as chemotherapy and radiotherapy may be recommended depending on the condition.

Continue Reading

science

Today, Monday 9/25/2023, expected temperature in Egypt

Published

on

Today, Monday 9/25/2023, expected temperature in Egypt


Written by Mahmoud Ragheb

Monday, September 25, 2023 at 12:00 AM

Expect a body Meteorology According to the weather forecast, there will be a slight rise in temperature today Monday, hot weather during the day in Greater Cairo, Lower Egypt and the northern coasts, hot in South Sinai and southern Upper Egypt, pleasant at night in the north of the country to northern Upper Egypt, moderate in southern Sinai and southern Upper Egypt.

The Bureau of Meteorology expects wind activity in some areas today and water fog in Greater Cairo, Lower Egypt, Northern Beaches, Canal Cities, Central Sinai, and some roads leading there from 4:70am. and Northern Upper Egypt. Tomorrow night will see a decrease in humidity… In most areas, this will add to the feeling of low temperatures.

As for the temperature today, Monday: Great Cairo 35 degrees, Minor 24 degrees, Alexandria 31, Minor 23, Metrou 30, Minor 22, Great Sohaq 38, Minor 23 degrees, Great Qana 41 degrees, Minor 25 degrees, Great Aswan 42 degrees. A minimum of 27 degrees.


Following is a report of temperature in cities and capitals in the governorates of the Republic:

Minimum temperature in Cairo is 24 and maximum is 35

Temperature in administrative capital, minimum 24 and maximum 35

Temperature on October 6, minimum 23 and maximum 36

The minimum temperature in Benha is 24 and the maximum is 35

The minimum temperature in Tamanhur is 24 and the maximum temperature is 34

The minimum temperature in Wadi Nadrun is 23 and the maximum is 36

See also  Shock .. Death with weightlifting champion Tariq Wahdan Corona

Temperatures in Kafr El-Sheikh, minimum 23 and maximum 34

Minimum temperature in Mansurah is 24 and maximum is 35

The minimum temperature in Zagazig is 25 and the maximum temperature is 36

The minimum temperature in Shibin Al-Qom is 24 and the maximum is 35

The minimum temperature in Thanda is 24 and the maximum is 34

Temperature in Damietta, minimum 25 and maximum 31

The minimum temperature in Port Side is 24 and the maximum is 32

Minimum temperature in Ismailia is 24 and maximum is 37

The minimum temperature in Suez is 23 and the maximum temperature is 36

The minimum temperature in Arish is 24 and the maximum is 32

Temperature in Rafah: Min 25 and Max 31

The minimum temperature in Ras Chitr is 23 and the maximum temperature is 36

Temperature in Nakhl: Min 20, Max 36

Temperatures in St. Catharine, minimum 16 and maximum 33

Minimum temperature will be 25 and maximum 34

The minimum temperature in Thapa is 25 and the maximum temperature is 34

Temperature in Sharm El Sheikh, minimum 28 and maximum 37

Minimum temperature in Alexandria is 23 and maximum is 31

The minimum temperature in El Alamein is 23 and the maximum is 31

Temperature in Matrouh, minimum 22 and maximum 30

Minimum temperature in Salum is 19 and maximum is 30

Temperature in Shiva: Min 20 and Max 37

See also  Pfizer makes pills to prevent corona when mixed with infected individuals

Minimum temperature in Hurghada is 27 and maximum is 38

The minimum temperature in Marsa Alam is 27 and the maximum is 37

The minimum temperature in Shaladin is 27 and the maximum is 37

Temperatures in Halayeip, minimum 27 and maximum 34

The minimum temperature in Abu Ramad is 28 and the maximum is 36

The minimum temperature in Ras Hatarapa is 29 and the maximum temperature is 35

The minimum temperature in Fayoum is 24 and the maximum temperature is 35

The minimum temperature in Beni Suef is 23 and the maximum temperature is 36

Minimum temperature in Minya is 21 and maximum is 37

Minimum temperature in Asyut is 22 and maximum is 38

Sohak has a minimum temperature of 23 and a maximum of 38

The minimum temperature in Kena is 25 and the maximum is 41

Temperature in Luxor, minimum 26 and maximum 41

Minimum temperature in Aswan is 27 and maximum is 42

Temperature in New Valley, low 20’s and high 40’s

Temperature in Abu Simbel, minimum 26 and maximum 40



Continue Reading

science

Health is organizing a science day to raise awareness about Alzheimer’s disease in conjunction with World Day

Published

on

Health is organizing a science day to raise awareness about Alzheimer’s disease in conjunction with World Day




Mona Zidane


Published on: Sunday, September 24, 2023 – 8:15 PM | Last Updated: Sunday, September 24, 2023 – 8:15 PM

The Ministry of Health and Population, in collaboration with the Alzheimer Society of Egypt and Ain Shams University, to raise awareness of Alzheimer’s disease, in conjunction with the World Disease Day, on September 21 every year, at the headquarters of the General Secretariat for Mental Health and Addiction Treatment.

The official spokesperson of the Ministry of Health and Population, Dr. Hossam Abdel Ghafar, explained that this science day emphasizes the importance of raising awareness about Alzheimer’s disease, how to reduce the risk of contracting the disease and ways to prevent it. It is summed up in following a healthy lifestyle such as complete diet, fluids, exercise, avoiding smoking and engaging in social activities, and introducing the symptoms of the disease today, which is reflected in the early detection. Improving recovery rates.

Science Day reviewed the current situation of Alzheimer’s disease in Egypt and the annual report of the Alzheimer Society Egypt, based on the infection rate, recovery rates and treatment plans based on scientific evidence, noted the discussion on ways to cope. with patients, especially the elderly.

On his part, the Secretary General of the Secretariat for Mental Health and Addiction Treatment, Dr. Menon Abdel Maqsood, on this day (Helwan Hospital, Mamourah Hospital, Al-Dumairah Hospital, Al-Dumairah Hospital, Al-Khanga Hospital, Shubra Ghas Hospital, Sohaq Hospital, Center Abbas Helmi, Alwan Center, Asiyat Hospital and Danta Hospital) Alzheimer’s Disease Covering everything related, especially for the elderly, training programs and lectures were given by the professors. Medicine at Ain Shams University, and several physicians affiliated with the Department of Geriatric Psychiatry at the Directorate of Psychiatry and Addiction Treatment.

See also  A small asteroid will pass harmlessly close to Earth tomorrow... details

He mentioned that awareness lectures and seminars will continue throughout this month of September. Given the importance of the role of awareness in empowering patients’ families on how to provide support to an Alzheimer’s patient.

Continue Reading

Trending

Copyright © 2023