LIFE CYCLE OF A STAR Stars are formed in nebulae‚ interstellar clouds of dust and gas (mostly hydrogen). These stellar nurseries are abundant in the arms of spiral galaxies. In these stellar nurseries‚ dense parts of these clouds undergo gravitational collapse and compress to form a rotating gas globule. The globule is cooled by emitting radio waves and infrared radiation. It is compressed by gravitational forces and also by shock waves of pressure from supernova or the hot gas released
Premium Star Sun White dwarf
The Life Cycles of Stars In the universe‚ there are hundreds of billions of stars. They are formed when gas and dust from space "clump" together. As the mass grows larger‚ gravity takes over and a core begins to form. The core becomes extremely dense and this compaction causes temperatures within it to rise to the point where nuclear fusion (the burning of hydrogen in a chain reaction) can begin. The heat generated by fusion can reach 24 million degrees F (Fahrenheit). "That amount of heat keeps
Premium Star White dwarf Sun
The main theme of "The Star" by Arthur C. Clarke deals with faith. Clarke defines faith as having belief and trust in God with strong conviction. Clarke believes that one must have faith not only during blissful times‚ such as during the time of creation‚ but also during time of anguish‚ such as when destruction occurs. God "created" when a star flew over Bethlehem‚ just as God destroyed a star‚ the Phoenix Nebula‚ and its surrounding planets including any life that may have lived there. God does
Free Star Galaxy Milky Way
Life cycle of a star Stars are born in nebulae. Huge clouds of dust and gas collapse under gravitational forces‚ forming protostars. These young stars undergo further collapse‚ forming main sequence stars. Stars expand as they grow old. As the core runs out of hydrogen and then helium‚ the core contacts and the outer layers expand‚ cool‚ and become less bright. This is a red giant or a red super giant (depending on the initial mass of the star). It will eventually collapse and explode. Its fate
Premium Star Sun Hydrogen
Stars are born in high density areas of space called nebulas. A nebula (as defined by Dictionary.com) is: A diffuse mass of interstellar dust or gas or both‚ visible as luminous patches or areas of darkness depending on the way the mass absorbs or reflects incident radiation. The stars are born because of the gravity of the nebula acts on itself‚ condensing the gas and dust into a protostar. A protostar is a very small star. The protostar begins to heat up‚ and if it has enough matter the core
Premium Star Sun White dwarf
cycle of a star How does gravity‚ nuclear fusion and mass affect the life cycle of a different sized stars? * Stars initially form from clouds of dust and gas. The force of gravity makes the gas and dust spiral in together to form a protostar. Gravitational energy has converted into heat energy‚ so the temperature rises * When the temperature gets high enough‚ hydrogen nucli undergo thermonuclear fusion to form helium nuclei and give out massive amounts of heat and light. A star is born. It
Premium Star White dwarf
Protostar This is the stage in which the star begins to form after the collapse of the interstellar cloud. It happens in small molecular clouds that can be referred to as dense cores. In the beginning the dense core has a level of balance between its own gravitational forces (self-gravity)‚ and both the magnetic pressure‚ and gas pressure. The self-gravity acts to compress the dense core‚ while the gas‚ and magnetic pressures act to inflate it. The core’s self-gravity will eventually overwhelm it
Premium Sun Galaxy Star
We are “star stuff”. Discuss in detail our connections to the stars as established by modern astronomy. Modern astronomy has allowed us to understand how the universe functions and also provides the answers to some of the big questions. Questions like the origin of the universe and origin of life itself. It tells us that stars are the cosmic furnaces where all most all the building blocks of life and planets were synthesized. Lighter‚ basic and abundant elements like hydrogen and helium
Premium Hydrogen Carbon Oxygen
The Vega star has many different characteristics and properties when compared to other stars. The star is a white main sequence star‚ meaning in is in class A. The Vega is a blue to white star with a temperature of approximately 17‚000 F (9‚500 C) and is already 455 million years old. It is surrounded by a large disc of dust and debris‚ which may be from that planetary collisions. The Vega star is 25 light years away from the earth and the mass is 2.1 times bigger than the sun’s mass. Also compared
Premium Sun Star Solar System
Point of View in "The Star" by Alasdair Gray By Sami Breem POBox 108 English Department Islamic University-Gaza Palestine sbreem@mail.iugaza.edu ملخص: يهدف هذا البحث لدراسة وجهة نظر الشخصية الرئيسية في قصة "النجم" للكاتب ألاسدير جراي، حيث تؤكد الدراسة على أهمية التحليل اللغوي للنص بالإضافة للتحليل الأدبي وذلك باستخدام نظريات في مجال أسلوبية الخطاب كما جاء في (كارتر وسمبسون 1989). ولغرض التحليل اللغوي يستخدم البحث نموذج الأفعال المتعدية كما جاء في (بيري 1975). لزيادة معرفة القارئ بعالم
Premium Star