The SUN Update

The Sun is a G-type main-sequence star (G2V) based on its spectral class. As such, it is informally and not completely accurately referred to as a yellow dwarf (its light is closer to white than yellow). It formed approximately 4.6 billion[a][14][22] years ago from the gravitational collapse of matter within a region of a large molecular cloud. Most of this matter gathered in the center, whereas the rest flattened into an orbiting disk that became the Solar System. The central mass became so hot and dense that it eventually initiated nuclear fusion in its core. It is thought that almost all stars form by this process.

The structure of the Sun contains the following layers: Core – the innermost 20–25% of the Sun's radius, where temperature (energies) and pressure are sufficient for nuclear fusion to occur. Hydrogen fuses into helium (which cannot currently be fused at this point in the Sun's life). The fusion process releases energy, and the core gradually becomes enriched in helium. Radiative zone – Convection cannot occur until much nearer the surface of the Sun. Therefore, between about 20–25% of the radius, and 70% of the radius, there is a "radiative zone" in which energy transfer occurs by means of radiation (photons) rather than by convection. Tachocline – the boundary region between the radiative and convective zones. Convective zone – Between about 70% of the Sun's radius and a point close to the visible surface, the Sun is cool and diffuse enough for convection to occur, and this becomes the primary means of outward heat transfer, similar to weather cells which form in the earth's atmosphere. Photosphere – the deepest part of the Sun which we can directly observe with visible light. Because the Sun is a gaseous object, it does not have a clearly defined surface; its visible parts are usually divided into a "photosphere" and "atmosphere".

Above the chromosphere, in a thin (about 200 km) transition region, the temperature rises rapidly from around 20000 K in the upper chromosphere to coronal temperatures closer to 1000000 K.[91] The temperature increase is facilitated by the full ionization of helium in the transition region, which significantly reduces radiative cooling of the plasma.[90] The transition region does not occur at a well-defined altitude. Rather, it forms a kind of nimbus around chromospheric features such as spicules and filaments, and is in constant, chaotic motion.[80] The transition region is not easily visible from Earth's surface, but is readily observable from space by instruments sensitive to the extreme ultraviolet portion of the spectrum.[92]

Variation in activity Measurements from 2005 of solar cycle variation during the last 30 years The Sun's magnetic field leads to many effects that are collectively called solar activity. Solar flares and coronal-mass ejections tend to occur at sunspot groups. Slowly changing high-speed streams of solar wind are emitted from coronal holes at the photospheric surface. Both coronal-mass ejections and high-speed streams of solar wind carry plasma and interplanetary magnetic field outward into the Solar System.[114] The effects of solar activity on Earth include auroras at moderate to high latitudes and the disruption of radio communications and electric power. Solar activity is thought to have played a large role in the formation and evolution of the Solar System. With solar-cycle modulation of sunspot number comes a corresponding modulation of space weather conditions, including those surrounding Earth where technological systems can be affected. he Treaty of Lutatius was the agreement of 241 BC between Carthage and Rome which ended the First Punic War after 23 years. The Romans had defeated a Carthaginian fleet attempting to lift the blockade of its last strongholds on Sicily. Accepting defeat, the Carthaginian Senate ordered the local commander to negotiate a peace treaty. One was rapidly agreed

COVID-19 New Asean

An analysis of those IFR rates indicates that COVID-19 is hazardous not only for the elderly but also for middle-aged adults, for whom a fatal COVID-19 infection is two orders of magnitude more likely than the annualized risk of a fatal automobile accident and far more dangerous than seasonal influenza.[89] Case fatality ratio (CFR) Another metric in assessing death rate is the case fatality ratio (CFR),[b] which is deaths attributed to disease divided by individuals diagnosed to-date. This metric can be misleading because of the delay between symptom onset and death and because testing focuses on individuals with symptoms (and particularly on those manifesting more severe symptoms).[79] On 4 August, WHO indicated "at this early stage of the pandemic, most estimates of fatality ratios have been based on cases detected through surveillance and calculated using crude methods, giving rise to widely variable estimates of CFR by country – from less than 0.1% to over 25%."[81]

As the global race to produce a Covid-19 vaccine continues, China appears to have made huge strides, with vaccines from two front-runners - Sinovac and Sinopharm - already making their way abroad.

he World Health Organization (WHO) in Cambodia has worked closely alongside the Royal Government of Cambodia, particularly the Ministry of Health (MOH), and in collaboration with partners, to respond to COVID-19 and ensure that Cambodia is prepared for community-level transmission so that the health, social and economic impacts of the disease can be minimized. WHO provides technical and operational support to MOH to find, isolate, test and care for COVID-19 cases, and to trace and quarantine their contacts. WHO has supported the development and implementation of the Cambodia Master Plan for COVID-19 and its nine priority action areas: Incident management and planning; surveillance and risk assessment; laboratory; clinical management and health care services; infection prevention and control; non-pharmaceutical public health measures; risk communication; points of entry; and operational logistics.

China is Cambodia's key political patron and largest source of development assistance, having helped funnel billions of dollars for infrastructure projects. This has fueled criticism that Phnom Penh has become over-reliant on, and a proxy for, Beijing. But Hun Sen, speaking remotely to Nikkei's Future of Asia conference on Thursday, called that criticism "unjust."

The Earth

The name Earth is at least 1,000 years old. All of the planets, except for Earth, were named after Greek and Roman gods and goddesses. However, the name Earth is a Germanic word, which simply means “the ground.”

Kid-Friendly Earth Our home planet Earth is a rocky, terrestrial planet. It has a solid and active surface with mountains, valleys, canyons, plains and so much more. Earth is special because it is an ocean planet. Water covers 70 percent of Earth's surface. Earth's atmosphere is made mostly of nitrogen and has plenty of oxygen for us to breathe. The atmosphere also protects us from incoming meteoroids, most of which break up before they can hit the surface. Visit NASA Space Place for more kid-friendly facts. Our home planet is the third planet from the Sun, and the only place we know of so far that’s inhabited by living things. While Earth is only the fifth largest planet in the solar system, it is the only world in our solar system with liquid water on the surface. Just slightly larger than nearby Venus, Earth is the biggest of the four planets closest to the Sun, all of which are made of rock and metal. The name Earth is at least 1,000 years old. All of the planets, except for Earth, were named after Greek and Roman gods and goddesses. However, the name Earth is a Germanic word, which simply means “the ground.” Size and Distance With a radius of 3,959 miles (6,371 kilometers), Earth is the biggest of the terrestrial planets, and the fifth largest planet overall. From an average distance of 93 million miles (150 million kilometers), Earth is exactly one astronomical unit away from the Sun because one astronomical unit (abbreviated as AU), is the distance from the Sun to Earth. This unit provides an easy way to quickly compare planets' distances from the Sun.

អាចម៍ផ្កាយមួយ​នឹងហោះមកកៀកផែនដីក្នុងសប្តាហ៍នេះ ខណៈមួយទៀតនឹងមកនៅដើមខែវិច្ឆ...

Collect Abandoned Puppy and Build Castle Mud Dog House on Unused Ant Hill

I found 4 more Abandoned puppies in the cave around 1 km far from my place and take them to the safe place then build the castle dog house for them with care feeding and give the the food. A lots abandoned dogs need help in my area.