Planetary nebulae are a type of supernova remnant formed when Sun-like stars first swell up to enormous sizes and then explode. When it happens to the Sun, its mantle will be flung outward to form a planetary nebula, while its core will linger on as a white dwarf. Named because their ...
What is a supernova explosion?Question:What is a supernova explosion?Star Life Cycles:Stars are formed when parts of dense clouds of interstellar gas (called a nebula) collapse in on their own gravity. The star begins to emerge from this, producing its own energy through the process of nucl...
In the core-collapse supernova type, the beginning of the supernova is marked by when the core of the star starts fusing silicon into iron. Usually, when elements are fused into heavier elements, energy is released, and this energy is what keeps the star from falling in on itself. Iron,...
What light elements are formed in the Big bang theory? Explain dark matter. What is the evidence for dark matter? Define "Black hole". What is the mass of the black hole? Which of the following best explains why the night sky is dark? A. The universe has not always looked the way ...
How many stars are there in the universe?(不需要准确数字)Where do they come from and where do they go to?What is the most common chemical element in the universe?How are all the other chemical elements formed?Define the terms:Galaxy,nebula,black hole,supernova,comet,asteroid,meteorite(这题...
What Is the Steady State Theory of the Universe? What Is a Pair-Instability Supernova or a PISN? What Is an Electron-Capture Supernova? What Is Stellar Nucleosynthesis via Nuclear Fusion?
but for a smaller star like the sun, the effect will be a bit less dramatic. The solar core will be compacted to an incredibly dense, hot state. At this point, the helium will begin fusing into heavier elements along with whatever traces of hydrogen remain in the outer layers of the su...
callednucleosynthesis. Supernovae are considered one of the original sources of the elements heavier than iron in the Universe. Even the iron in your blood can be traced back to supernovae or similar cosmic explosions from long before our Sun had formed. Supernovae are thus essential to life...
It is in these types of objects that the heaviest elements in the Universe are formed. Additional resources Asimulationshows how stars exchange material through a stable gravitational point via a process called Roche lobe overflow.Another simulation, created by NASA, shows what happens in a binary...
This is done either through the formation of a planetary nebula or a supernova. In this way, stars produce and distribute heavier elements such as carbon, nitrogen, and oxygen in the universe. The Sun is the closest star to Earth; however, many other stars are visible at night. One of ...