My shiny padletجسور التعلم by سماح مواجده

Tala Hazim AlRawashdeh

2022-04-29 00:10:13 UTC

Three fact I know about the star:

1. The Sun is the closest star.

2. Stars are made of the same stuff.

3. Stars are in perfect balance.

Jamela essam rawashdeh

2022-04-29 00:13:47 UTC

Stars
star is a large, bright, globular astronomical body of plasma held together by gravity. The star derives its brilliance from the nuclear energy generated in it, where hydrogen atoms fuse with each other

Most of the components of the star are ionized hydrogen and ionized helium (they are called in the case of ionized plasma). Astronomical observations have shown that a large proportion of stars have planets revolving around them, just as they are in the solar system

Shahed marwan alawi

2022-04-29 00:34:27 UTC

Characteristics of stars Stars are known as huge celestial bodies characterized by intense heat. Stars are flaming and luminous bodies of their own. Hydrogen gas constitutes the largest proportion in the formation of stars. Helium gas and a small percentage of the elements with low atomic weight enter the formation of stars. The Sun is the largest star in terms of size, and it is also the closest star to Earth, and its distance from Earth reaches 150 km. 0

Naba al Rawashdeh’

hyunj2274 — 2022-04-29 00:50:05 UTC

Hyunjin ⭐️⭐️⭐️⭐️⭐️⭐️✨✨✨✨
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. Other stars are visible from Earth during the night, when they are not obscured by atmospheric phenomena, appearing as a multitude of fixed luminous points because of their immense distance. Historically, the most prominent stars on the celestial sphere were grouped together into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.

For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen in its core releasing energy that traverses the star's interior and then radiates into outer space. Almost all naturally occurring elements heavier than helium were created by stars, either via stellar nucleosynthesis during their lifetimes or by supernova nucleosynthesis when stars explode. Astronomers can determine the mass, age, chemical composition and many other properties of a star by observing its spectrum, luminosity and motion through space. The total mass of a star is the principal determinant in its evolution and eventual fate. Other characteristics of a star are determined by its evolutionary history, including diameter, rotation, movement and temperature. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.

2022-04-29 00:55:51 UTC

Naba al rawashdeh

Reem Yasser Al-Abdullah

2022-04-29 11:07:06 UTC

Ansam Hisham Al Sarairah

2022-04-29 13:26:55 UTC

روعه مراد القراله

2022-04-29 15:49:35 UTC

The emerging stars differ in terms of their masses, most of them have close to the mass of the Sun; In those great numbers of stars we find small stars smaller than the Sun - perhaps with a mass of 1 and 0 solar masses - and very large stars with a mass of about 200 solar masses. There is a group of merchandise that is on a particular topic, which is a group of business messages

فرح محمد القاضي

2022-04-29 17:53:48 UTC

A star is a massive, bright, spherical body of plasma held together by gravity. The closest star to Earth is the Sun, which is the source of most of the planet's energy. Some other stars are visible during the night when they are not covered by clouds or other atmospheric phenomena and appear as many bright spots due to their great distance from the Earth. Historically, the most important stars in the celestial sphere were grouped together in asteroids and constellations, while the brightest stars had certain names. Astronomers have compiled a comprehensive catalog of uniform names for the stars.
Binary and multi-star systems consist of two or more gravitationally limited stars, which generally move around each other in stable orbits. When two of these stars do not have a relatively close orbit, the gravitational interaction has a major influence on their evolution into structures with greater gravity, such as star clusters and galaxies.

شيماء طارق الصرايرة (عاشر ب)

2022-04-29 18:02:26 UTC

The star is a huge spherical body that derives its luster from the nuclear fusion reactions that occur in its core, which result in elements heavier than hydrogen, and the sun is the star that provides the planet with light and radiation, and provides conditions that make it a suitable place for the emergence of various forms of life,[1] and the stars receive attention And a study by astronomers to identify the distinctive characteristics of each of them, where the knowledge of one of the characteristics leads to the identification of other characteristics, by observing the star’s spectrum, luminosity, and movement in space, scientists are able to determine its mass, age, and chemical composition, and by knowing the mass of the star The history of its inception, evolution, and final fate can be determined, and by knowing the evolutionary history of the star it is possible to know the diameter of its rotation, its rotation mechanism, and its temperature.[2] The visible universe contains tens of billions of trillions of stars, but the naked eye is able to see a few There are many stars in the universe in the form of pairs, multiple systems, or star clusters that are physically related to each other through their common origin and attraction to each other, and there are groups of stars known as unions. A stellar association consists of stars that are physically similar, except that their masses are less than that which allows them to be attracted to each other enough to form star clusters.

هبه بكر امين البطوش

alsrayrtblal577 — 2022-04-29 18:07:03 UTC

عاشر(ب)

Razan Mohamed Al_sraireh

2022-04-30 09:46:44 UTC

Tenth Gread (b)

Razan Mohamed Al_sraireh

2022-04-30 09:48:49 UTC

Tenth Gread (b)

سارة محادين

2022-04-30 13:12:56 UTC

smahmwajdh — 2022-04-30 13:34:06 UTC

smahmwajdh — 2022-04-30 13:36:18 UTC

" THE STAR'S "

2022-04-30 13:53:27 UTC

Definition of stars A star is a huge spherical body that derives its luster from the nuclear fusion reactions that occur in its core, which result in elements heavier than hydrogen, and the sun is the star that provides the planet with light and radiation, and provides it with conditions that make it a suitable place for the emergence of different forms of life The stars are given attention and study by astronomers to identify the distinctive characteristics of each of them, as knowledge of one of the properties leads to the identification of other properties. The mass of the star can determine the date of its inception, development, and final fate, and by knowing the evolutionary history of the star it is possible to know the diameter of its rotation, its rotation mechanism, and its temperature.[2] The visible universe contains tens of billions of trillions of stars, but the naked eye is able to see There are very few of them, and there are many stars in the universe in the form of pairs, or multiple systems, or star clusters that are physically related to each other through their common origin and attraction to each other, and there are groups of stars known as In stellar associations (English: stellar association) they are composed of physically similar stars, except that their mass is less than that which allows them to be attracted to each other sufficiently to form star clusters. Star-Forming Nebula: A star begins its life as a nebula, that is, a cloud of dust and gas, mostly hydrogen, whose components have gathered by the action of gravity. The protostar stage: The protostar stage begins when the cloud collapses due to gravity, and its components collide, causing its temperature to rise. heat and light; Therefore, the protostar is luminous. The main sequence stars stage: In this stage, the external force resulting from nuclear fusion balances with the internal gravitational force, and the star reaches a state of stability or hydrostatic equilibrium, and this stage constitutes the longest life stage of the star. Red giant: When hydrogen fuel begins to run out of the star's core, the star's outer layers continue to push inward; Which raises the temperature of the core enough to start a new series of nuclear fusion reactions, so the external force overcomes the force of internal gravity, and thus the star expands, increases in size and becomes a red giant. The stage of star death: the length of a star’s life and how it dies depends on its size at the beginning of its formation, where a small star can live billions of years, and an example of this is the sun, in which nuclear reactions continue for ten billion years, while large stars die quickly, where some live only 40,000 years old; This is because it needs nuclear reactions to occur at a tremendous rate to maintain its hydrostatic balance, which means that its hydrogen fuel runs out quickly,[5] and the method of death of different stars in terms of mass can be described as follows:[6] Medium-sized stars: After the hydrogen fuel has completely run out in medium-sized stars The mass of which is more than one and a half times the mass of the Sun, the temperature of the red giant begins to decrease, and it emits white light, so it is known as the white dwarf, and after the star cools completely, it turns into a black dwarf. Massive stars: Massive stars whose mass is 1.5-3 times the mass of the Sun change from the red giant stage to the supernova stage, where all heavy elements undergo an explosion, and the star turns into a neutron star, which is A star with a mass of 1.4 the mass of the sun, and the neutron star is characterized in addition to its rotation speed as one of the most dense types of stars, and the neutron star that emits radio waves is called a pulsar. Giant stars: Giant stars with a mass more than three times the sun change from a red giant to a supernova, which in turn turns into a black hole (English: Black hole), which is an object with a very high gravitational pull so that no light can escape from it, and the presence of it cannot be detected. Black holes are caused only by radiation emitted by the objects that absorb them. Star classifications Stars are classified according to their spectral characteristics into seven degrees expressed using the letters (O, B, A, F, G, K, M), and each spectral type includes ten sub-classes bearing numbers from 0-9, and this classification is used to denote star temperature; The star (O) is the hottest, and the letters following it indicate the gradation in coldness, where the star (M) is the coldest. As for the numbers that indicate the subcategories, they range from 0, which is the hottest, to 9, which is the coldest. The temperature of the star determines its color and brightness. The following table shows the classification of the spectra of stars: [7] The spectra of stars Surface temperature Characteristics O More than 25,000 K. It contains hydrogen, neutral helium, and ionized helium. B of 10,000-25,000 K contains ionized hydrogen and helium, and no neutral helium. A of 7,500-10,000 K contains hydrogen, ionized helium, and calcium ions, but no neutral helium. F of 6,000-7,500 K contains hydrogen and minerals such as calcium ions, iron and others. G of 5,000-6,000 K contains hydrogen, metals, and some molecules. K of 3,500-5,000 K contains metals, and some molecules. M is less than 3500 K and contains metals and some molecules.

NAME:SHAHED SARAIRAH

sababtsjimin2005 — 2022-04-30 19:52:58 UTC

رنا عامر المحادين

2022-05-01 15:19:46 UTC

نور محمد الشواوره

2022-05-01 17:04:14 UTC

عاشر ب

قانتة راكان القرالة

aqralh30 — 2022-05-03 19:54:21 UTC

A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. Other stars are visible from Earth during the night, when they are not obscured by atmospheric phenomena, appearing as a multitude of fixed luminous points because of their immense distance. Historically, the most prominent stars on the celestial sphere were grouped together into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.

For at least a portion of its life, a star shines due to thermonuclear fusion of hydrogen in its core releasing energy that traverses the star's interior and then radiates into outer space. Almost all naturally occurring elements heavier than helium were created by stars, either via stellar nucleosynthesis during their lifetimes or by supernova nucleosynthesis when stars explode. Astronomers can determine the mass, age, chemical composition and many other properties of a star by observing its spectrum, luminosity and motion through space. The total mass of a star is the principal determinant in its evolution and eventual fate. Other characteristics of a star are determined by its evolutionary history, including diameter, rotation, movement and temperature. A plot of the temperature of many stars against their luminosities, known as a Hertzsprung–Russell diagram (H–R diagram), allows the age and evolutionary state of a star to be determined.

قانتة راكان القرالة

aqralh30 — 2022-05-03 19:59:32 UTC

Life cycle of a stars

2022-05-03 21:32:05 UTC

انفال كساسبة

A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. Other stars are visible from Earth during the night, when they are not obscured by atmospheric phenomena, appearing as a multitude of fixed luminous points because of their immense distance. Historically, the most prominent stars on the celestial sphere were grouped together into constellations and asterisms, and the brightest stars gained proper names. Extensive catalogues of stars have been assembled by astronomers, which provide standardized star designations.

Afnan Ali Al_mawajdeh

2022-05-04 16:04:40 UTC

Safa Emad alqrallah

2022-05-05 12:49:18 UTC

Safa Emad alqrallah

2022-05-05 13:02:51 UTC

سرى النعيمات

2022-05-05 14:26:02 UTC

Jamalat Alsaied

khna16431 — 2022-05-07 15:29:32 UTC

Star is the body of a huge astronomical spherical plasma and shiny and coherent by gravity. Derives star luster generated from nuclear energy in it, where hydrogen atoms fuse with each other heavier elements composed of hydrogen, such as helium and lithium and other light elements up to iron. This interaction is called a nuclear physicist merger produces about a very large thermal energy up to us in the form of light rays

Most of the star components are an element of hydrogen and helium ionized ionized (two in the case of ionization are called plasma). Astronomical observations have shown that a large proportion of the stars have planets revolving around them as they are present in the solar system.

The nearest star to Earth is the sun is the energy source of the Earth. As the sun's energy to reach other planets that make up the solar system. And some of the other stars are visible during the night when they are not covered by clouds or other atmospheric phenomena and show many illuminated dots because after the massive ground.

Star breed in high-density areas extended in the interstellar medium, where the center consists of interstellar mainly of hydrogen and helium and a few metal elements; The intensity of those clouds despite the intensity of density are still less than the density of an empty vial of gas in the lab (empty room). These clouds are called molecular fasteners and often contain hydrogen with 23-28% helium and a few percentage of the other heavy elements. One example of these generated areas of stars are Orion Nebula

Star rotation speed determines his age. Astronomers have found a new possibility to determine the age of stars by observing the speed of rotation around itself. And decreasing the speed during the life of the star in a distinctive, so when you lose some of its mass by radiation which is broadcast on in space, and thus can be linked to the age and color of the star. Since this process does not require contrast to other data Note After the star, which can not be determined accurately, researchers can estimate the age of the star error does not exceed 15%. Fits this measurement, in particular, the individual stars that do not appear in clusters astrocyte

سرى باسم النعيمات

2022-05-07 17:11:23 UTC

سرى باسم النعيمات

2022-05-07 17:12:51 UTC

smahmwajdh — 2022-05-07 18:21:28 UTC

smahmwajdh — 2022-05-07 18:21:45 UTC

smahmwajdh — 2022-05-07 18:21:56 UTC

smahmwajdh — 2022-05-07 18:23:46 UTC

سرى باسم النعيمات

2022-05-08 18:18:20 UTC

Sewar Bashar Qaralleh

2022-05-09 11:10:10 UTC

مريم الشواوره

2022-05-09 17:50:07 UTC

Sewar Bashar Qaraleh

2022-05-13 14:12:48 UTC