Fusion reaction in sun

Fusion in the Sun - Universe Toda

Proton Fusion, the Sun's Power Source, Explained (Infographic

  1. Nuclear fusion is a process where two or more nuclei combine to form an element with a higher atomic number (more protons in the nucleus). Fusion is the reverse process of nuclear fission. Fusion reactions power the Sun and other stars. Fusion releases energy. The energy released is related to.
  2. This fusion process occurs inside the core of the Sun, and the transformation results in a release of energy that keeps the sun hot. The resulting energy is radiated out from the core of the Sun and moves across the solar system. It is important to note that the core is the only part of the Sun that produces any significant amount of heat.
  3. The energy released in the fusion of 4 hydrogen atoms may not seem to be very much but there are a LOT of hydrogen atoms in the sun. Since we can measure the amount of energy we receive from the sun it is quite easy to estimate how many fusion reactions must occur each second to power the Sun
  4. ant fusion pathway in stars 1.5 times more massive, than our Sun. This process also fuses four protons into a Helium nucleus, by using Carbon (C), Nitrogen (N) and Oxygen (O) nuclei as catalysts
  5. In the core, pressures and temperatures are high enough to force fusion, that is, nuclear reactions whereby some nuclei merge to make others. It is the type of reaction that powers a hydrogen bomb. The most important reaction within the core of the Sun is the process called the proton-proton cycle
  6. g majority of light, heat, and energy on Earth's surface, and is powered by nuclear fusion. But less than half of that, surprisingly, is the fusion of.
  7. The Sun contains 99.8 percent of all matter in the solar system. Under crushing pressure and extreme temperatures generated by gravity, the violent process of nuclear fusion powers the tremendous.

Without fusion, there would be no life on Earth. What we see as light and feel as warmth is the result of a fusion reaction in the core of our Sun: hydrogen nuclei collide, fuse into heavier helium atoms and release tremendous amounts of energy in the process Nuclear Reactions in the Sun. goal of a controlled fusion reaction, but reactor materials melt at a few thousand degrees! It would take another 4 billion years to consume all the Sun's hydrogen. Fusion only happens in the core (10 7 K) The fusion reaction in the Sun is the same as that in all mainsequence stars. However in a supernova the fusion reaction in thecore of the star stops (with the production of iron) and it is. However, in spite of such substantial amounts of energy being released in nuclear fusion reactions, there are no full-time nuclear reactors built so far for fusion reaction as it is very hard to. Inside the sun, fusion reactions take place at very high temperatures and enormous gravitational pressures The foundation of nuclear energy is harnessing the power of atoms. Both fission and fusion are nuclear processes by which atoms are altered to create energy, but what is the difference between the two? Simply put, fission is the division.

What Is the Fusion Reaction That Occurs in the Sun

Nuclear fusion: Nuclear fusion, process by which nuclear reactions between light elements form heavier elements. In cases where interacting nuclei belong to elements with low atomic numbers, substantial amounts of energy are released. The vast energy potential of nuclear fusion was first exploited in thermonuclear weapons Does fission occur in the Sun? Although the energy produced by fission is comparable to what is produced by fusion, the core of the sun is dominated by hydrogen and at temperatures where hydrogen fusion is possible, so that the dominant source of energy per cubic meter is in fusion rather.

Fusion Reactions - Windows to the Univers

  1. g energy in an amount given by E = mc2. B) the same mass as the four hydrogen nuclei, because the mass of any product has to equal the mass of the sum of its parts by the law of conservation of.
  2. ates in stars with masses less than or equal to that of the Sun's, whereas the CNO cycle, the other known reaction, is suggested by theoretical models to do
  3. The sun burns hydrogen in a nuclear furnace. The fusion reaction in the sun is a multistep process in which hydrogen is burned into helium, hydrogen being the fuel and helium the ashes. The reactions in sun are nuclear fusion reactions. In this reaction: four hydrogen atoms (4 protons) combine to form one helium atom (2 protons + 2 neutrons)
  4. Fusion is the process which powers the sun and the stars. It is energy that makes all life on earth possible. It is called 'fusion' because the energy is produced by fusing together light atoms, such as hydrogen, at the extremely high pressures and temperatures which exist at the centre of the sun (15 million ºC)

Nuclear fusion in the Sun - Energy Educatio

  1. Fusion reactions power the Sun and other stars. For a fusion reaction to occur it is necessary to bring the reactants so close together that nuclear forces become important and glue the reactants together
  2. However, the Sun possesses a property which serves as an auto-regulation mechanism for the fusion reaction. [4] That is, the fusion rate will increase or decrease to keep the core temperature at a constant value. To understand this mechanism, we must take a macroscopic view of the Sun
  3. g from the Sun comes from the fusion reactions happening inside the core of the Sun. Inside the Sun, the pressure is million of times more than the surface of the Earth, and the temperature reaches more than 15 million Kelvin. Massive gravitational forces create the these conditions for nuclear fusion
  4. astronomy chapter 14 and 15. STUDY. PLAY. Terms in this set (...) 4 hydrogen nuclei become 1 helium nucleus. What is the overall fusion reaction that converts mass into other forms of energy in the Sun's core? Which of the following changes would cause the fusion rate in the Sun's core to.
  5. The core is the only part of the Sun that produces an appreciable amount of heat through fusion. In fact, 99% of the energy produced by the Sun takes place within 24% of the Sun's radius
  6. Fusion Energy Release. A large amount of energy is released by nuclear fusion reactions.It seems that for power generation, the deuterium-tritium reaction is the most practical, but it provides most of the energy to the released neutron. That is problematic because it is harder to extract the energy from neutrons compared to charged particles

C) The radiation produced by fusion reactions that is trapped in the core gradually raises the temperature, increasing the rate of fusion. D) The Sun gets heavier as it gets older, and the stronger inward pull of gravity increases the fusion rate. E) The rate of fusion is not rising; it is actually decreasing over time The core starts from the center and extends outward to encompass 25 percent of the sun's radius. Its temperature is greater than 15 million degrees Kelvin [source: Montana].At the core, gravity pulls all of the mass inward and creates an intense pressure. The pressure is high enough to force atoms of hydrogen to come together in nuclear fusion reactions -- something we try to emulate here on. Hydrogen, and an awful lot of energy

Nuclear Fusion in the Sun - KCV

  1. The sun uses the Proton-Proton Chain. Step 1 is to fuse 2 Hydrogen nuclei into deuterium. Most of these fusions generate di-protons which decay right back into light Hydrogen nuclei, but occasionally the di-proton will emit a positron and an electron neutrino which will yield deuterium
  2. The basic fusion reaction through which the sun produces energy is when two isotopes of hydrogen, deuterium and tritium, atoms undergoes fusion reaction resulting to an helium atom, an extra neutron and energy. In this reaction, some mass are being transformed into energy
  3. Fusion: The quest to recreate the Sun's power on Earth. Here on Earth, any fusion reaction will have to take place at a tiny fraction of the scale of the Sun, without the benefit of its.
  4. Fusion of hydrogen to helium in the sun's core proceeds in four stages. In the first, two hydrogen nuclei -- or protons -- collide to produce deuterium -- a form of hydrogen with two protons. The reaction produces a positron, which collides with an electron to produce two photons
  5. Helmholtz could not have known that the Sun is a powerful fusion reactor because nuclear physics was not yet understood. Nuclear reactions inside the Sun, as in all stars, do two important things: they generate energy, and they gradually change the Sun's composition because they build up increasingly heavy nuclei
  6. The Sun can have a controlled fusion process and not blow up all at once because of the hydrostatic equilibrium ``thermostat''. Hydrostatic Equilibrium Controls the Reaction Rates Hydrostatic equilibrium is the balance between the thermal pressures from the heat source pushing outwards and gravity trying to make the star collapse to the very.

The sun produces energy through nuclear fusion. The sun is a large ball of hydrogen and helium undergoing constant nuclear fusion, in which atoms of hydrogen combine to form helium and release a large quantity of energy. The enormous pressure in the sun keeps the fusion running for huge amounts of time Proton-Proton Fusion This is the nuclear fusion process which fuels the Sun and other stars which have core temperatures less than 15 million Kelvin. A reaction cycle yields about 25 MeV of energy WHAT IS FUSION? Fusion is the process that powers the sun and the stars. It is the reaction in which two atoms of hydrogen combine together, or fuse, to form an atom of helium. In the process some of the mass of the hydrogen is converted into energy Nuclear reactions in the sun nuclear reactions in the sun thermonuclear fusion proton chain reaction wikipedia Nuclear Reactions In The Sun Nuclear Reactions In The Sun Thermonuclear Fusion Proton Chain Reaction Wikipedia Nuclear Reactions In The Sun The Solar Furnace Windows To Universe Nuclear Fusion Wikipedia Nuclear Fusion Do The Math Nuclear Fusion In Stars Universe Today Nuclea

Nuclear Fusion in the Sun Explained Perfectly by Scienc

How does the fusion in the Sun work? The Sun is very hot. In fact, it is so hot that it provides enough warmth and light to our planet. How did it become hot in the first place? The Sun is made up of light gasses, specifically hydrogen. What happens to hydrogen inside its core [ Fusion powers the stars and high yield thermonuclear weapons. solar fusion. Stars begin as a cloud of mostly hydrogen with about 25% helium and heavier elements in smaller quantities. The sun, 10 7 K core, hydrogen fuses to form helium through a process known as the proton-proton chain (often shortened to the p-p chain) PDF | We discuss the possibility of studying nuclear reactions in the sun by means of solar neutrinos and helioseismology. In particular we review the observational information which is available. However, there are a huge number of protons in the sun, so some protons undergo this reaction right away, as soon as the temperature is high enough. Does this help? Feb 26, 2013 #6 C. When did nuclear fusion in the sun really start ? E. Questions about Nuclear Fusion in the Sun

Nuclear fusion is a type of nuclear reaction where two light nuclei collide together to form a single, heavier nucleus. The products of this reaction are generally unstable compound nuclei, and thus they decay into more stable daughter products. This fusion results in a release of energy because the mass of the new nucleus is less than the sum of the original masses Although the energy produced by fission is comparable to what is produced by fusion, the core of the sun is dominated by hydrogen and at temperatures where hydrogen fusion is possible, so that the dominant source of energy per cubic meter is in fusion rather then the fission of very low abundance radioisotopes

The process that fuels our sun and allows it to give off that much energy is called nuclear fusion. Nuclear fusion is a reaction where two atomic nuclei fuse together to create a larger nucleus. Check out the infographic to learn about this futuristic energy source. You'll find out how fusion reactions power the Sun, how researchers replicate them in the lab and what lies ahead for fusion energy. A fusion power plant might sound like science fiction, but it could be a reality in the not-too-distant future. Take a look The nuclear fusion in our sun combines two hydrogen atoms (the smallest and lightest atoms) together to form one helium atom (a slightly larger atom). During the process some of the mass is converted into energy It's well established that nuclear fusion — the reaction that powers our Sun — could be the key to unlocking clean, limitless energy here on Earth. But one of the biggest challenges of.

The Sun's Structure and Nuclear Fusion

Fusion reactions release 3-4 times more energy than fission reactions. Although there are no Earth-based fusion systems, the sun's output is typical of fusion energy production in that it constantly converts hydrogen isotopes into helium, emitting spectra of light and heat The sun is so powerful we can harness the energy from it to make our lives easier - ever heard of solar energy (using the heat from the sun to heat the water for your house)? Now that you know a little more about the sun, solar energy has a different meaning. True solar energy comes from the nuclear fusion reactions of the sun's interior

The Sun's Energy Doesn't Come From Fusing Hydrogen Into

Can fusion and fission happen at the same time, in the same place? I was talking with a friend, and he thinks that fission and fusion happen at the same time at the sun, is that true? I guess this. To capture and control on Earth the fusion reactions that drive the sun and stars, researchers must first turn room-temperature gas into the hot, charged plasma that fuels the reactions. At the U. China's artificial sun can now heat plasma to 100 million degrees C, the minimum temperature needed to produce a self-sustaining nuclear fusion reaction

How Does Fusion Power the Sun? - YouTub

Solar energy is any form of energy radiated by the sun, including light, radio waves, and X-rays. Thermonuclear fusion is the energy producing process which takes place continuously in the sun and stars Neutrinos react extremely weakly with other forms of matter. They can escape from the center of the sun virtually unimpeded and they carry away about 2% of the energy from the fusion reactions occurring there. (From Nick Strobel. Go to his site at www.astronomynotes.com for the updated and corrected version. The core is the only part of the sun that produces an appreciable amount of heat through fusion. In fact, 99% of the energy produced by the sun takes place within 24% of the sun's radius

Fusion - ITE

Fusion, the nuclear reaction that powers the Sun and the stars, is a potential source of safe, non-carbon emitting and virtually limitless energy. Harnessing fusion's power is the goal of ITER, which has been designed as the key experimental step between today's fusion research machines and tomorrow's fusion power plants Introduction Elements are produced in the cores of high-mass stars by fusion reactions. All stars start by burning hydrogen and end up creating many heavier elements inside their cores. It is this kind of star that will eventually spread the elements it created in its core when it dies in a supernova explosion Fusion requires temperatures about 100 million Kelvin (approximately six times hotter than the sun's core).; At these temperatures, hydrogen is a plasma, not a gas. Plasma is a high-energy state of matter in which all the electrons are stripped from atoms and move freely about.; The sun achieves these temperatures by its large mass and the force of gravity compressing this mass in the core Nuclear fusion nuclear fusion thermonuclear fusion nuclear reactions in the sun Nuclear Fusion Nuclear Fusion Thermonuclear Fusion Nuclear Reactions In The Sun Why Is Fusion Energy So Challenging To Achieve American Security The Future Of Power Nuclear Fusion Versus Fission A Guide For Nuclear Fusion Do The Math Nuclear What Is Nuclear Fusion Fission And Fusion Chemistry Libretext Nuclear fusion reactions in the sun. The figure shows the principal reactions in the pp fusion chain in the sun. The BP2000 solar model was used to calculate the fraction of the terminations of the chain in which a given reaction participates. The neutrino energies contain small corrections due to thermal phenomena in the Sun

Nuclear Reactions in the Sun - University of Arizon

Some 99% of the Sun's energy is generated through reactions that begin with the fusion of two protons. This proton-proton chain proceeds via a number of different routes. The most common route involves the fusion of two helium-3 nuclei, while others feature the temporary production of beryllium-7 and one the creation of boron-8 Therefore, observations of neutrinos from the direction of the Sun show that the Sun is undergoing nuclear fusion reactions right up until the present day. If the fusion reactions in the Sun's core were to suddenly turn off for some reason, then there are plenty of ways we'd know about it The 'H-bomb' is a fusion reaction and, again, as we're told, is the energy-producing reaction deep inside our sun and indeed in all stars. But unlike an H-bomb, the fusion reaction inside our sun (we're told) just keeps on giving. It is, in effect, a controlled reaction

What is the product of a fusion reaction on the sun

  1. The by-product of nuclear fusion in the Sun's core is a massive volume of energy that gets released and radiates outward toward the surface of the Sun and then into the solar system beyond it. The nuclear fusion reaction that occurs in the Sun's core is similar to the reaction
  2. The sun produces energy via fusion. One of the fusion reactions that occurs in the sun is. 4 1 1 H? 4 2 H e + 2 0 1 e. How much energy in joules is released by the fusion of 1.11 g of hydrogen-1? Part B: Nuclear power plants produce energy using fission. One common fuel, uranium-235, produces energy through the fission reaction
  3. This process, called the CNO (carbon-nitrogen-oxygen) cycle, occurs in stars more massive than the Sun. The CNO cycle still requires hydrogen to proceed, so even in these stars the main fuel for the fusion reaction is hydrogen. In both the proton-proton chain and the CNO cycle, one element is being converted into another via nuclear fusion
  4. Based on the longevity of our Sun, nuclear fusion also has the potential to supply humanity with energy for as long as we need it - if we can figure out how to harness the reaction, that is. And that's a pretty big 'if', because scientists have been working on the problem for more than 60 years, and we're still a fair way off our goal
  5. Nuclear fission is an exothermic reaction while nuclear fusion is an endothermic reaction. A significant amount of energy is released in nuclear fission; In a fusion reaction, the energy released is very greater than a fission; Starting elements in fission reaction have a higher atomic number than products of the reaction
  6. Thermonuclear Fusion Each second, the sun transforms 700 million tons of hydrogen gas into 695 million tons of helium gas through the nuclear reaction of fusion. The remaining 5 million tons of matter (about 600 times the weight of water flowing over Niagara Falls in one second) escape as pure energy
  7. To put fusion into work, scientists need a sustainable container to endure the immense energy of the fusion reaction. Only to spark the reaction it takes millions of degrees of temperature and an equal amount of pressure. No metal, no element on Earth can stand these extremes, the reaction chamber would burst open instantly

hydrogen atoms fusing to Helium atoms and some energy is released.in Sun. The core of Sun is under very high pressure and temperature.Temperature may be about 15 million degree .k. The reaction is called proton proton chain, 4 hydrogen Atoms becoming a helium atom and about 0.7% mass is converted into energy Nuclear Reaction Taking Place in Sun (stars) It has been estimated that the sun is giving out energy equally in all possible directions at the rate of 3.7 × 10 33 ergs/sec. The energy of the sun is supposed to arise from the fusion of hydrogen nuclei into helium nuclei which in going on inside it all the time

Nuclear Fusion Fusion energy explained with Hydrogen atom

In nuclear fusion, after 100,000,000 degrees is reached, a thermonuclear reaction takes place, and the 2 isotopes of hydrogen are combined, forming helium, after fusion takes place, is is self sustaining, putting out more energy than put in Apr 01, 2019 · How the Sun creates energy is a fascinating question. Replicating the process of nuclear fusion here on Earth would allow us to create nearly-unlimited clean energy Fusion has reduced the central hydrogen abundance of the Sun by about a factor of two in the 4.6Gyrsinceitsformation;thusthefusionrateperprotonis≈ 5×10−18 s−1. Letuscompare this to a characteristic proton-proton collision rate, npσvth, where n≈ 6 × 1025 cm−3 is th The overall fusion reaction by which the Sun currently produces energy is A) 3 H ⇒ 1 Li + energy. B) 3 He ⇒ 1 C + energy. C) 4 H ⇒ 4 He + energy

Fusion the combining of two light nuclei to form a heavier, more stable nucleus. For example, the following reactions (among others) take place in the sun: Fusion reactions have very high activation energies (why?) so only occur at very high temperatures. The fusion reaction which requires the lowest temperature (40,000,000 K!) is Thermonuclear reaction definition, a nuclear-fusion reaction that takes place between the nuclei of a gas, especially hydrogen, heated to a temperature of several million degrees. See more 1 Answer to The net nuclear fusion reactions inside the Sun can b written as 41H → 4He + ∆E. The rest energy of each hydrogen atom is 938.78 MeV and the rest energy of the helium-4 atom is 3 728.4 MeV. Calculate the percentage of the starting mass that is transformed to other forms of energy. - 44127 You and I are solar powered, at least indirectly. It's the Sun's energy that grows plants that (one way or another) we eat and get our energy from. Until Einstein derived E = mc 2 from his special theory of relativity it was a complete mystery as to what the fuel source of the Sun was. For example, it had been calculated that if the Sun was made of coal it would use up its total fuel supply. The energy released by fusion also helps sustain the nuclear fusion reaction. Our sun has a core temperature of 16 million Kelvin and a core pressure of 25 thousand trillion Newtons per square meter. The sun gets so hot from its nuclear fusion that it glows and emits light, just like how a piece of metal glows red if you heat it up

At a certain value of the fusion product, called ignition, the reaction becomes self-sustaining: the heat generated by the reaction is enough to keep the plasma hot and so the external heating systems can be turned off. For deuterium-tritium fusion this value is about : nτT ≥ 5×10 21 m-3 s KeV After fake moon, China trying to create an artificial sun As per reports, China's Hefei Institutes of Physical Sciences is working on an earth-based sun simulator which basically is a fusion reactor

The nuclear reaction rate in the Sun is lower than what our calculations say. This was possible but many people checked and re-checked the physics of the reaction rates. There are some strong constraints in how much you can lower the temperature in the core of the Sun to slow down the reactions The fusion of four protons to form a helium nucleus, two positrons (and two neutrinos), for example, generates 24.7 MeV of energy. Most of the energy radiated from the surface of the sun is produced by the fusion of protons to form helium atoms within its core. Fusion reactions have been duplicated in man-made devices The sun, like all stars, releases energy through nuclear fusion. In this problem, you will find the total number of fusion reaction events that occur inside the sun every second. You will be considering the proton-proton chain, in which four hydrogen nuclei are converted into a helium nucleus and two positrons There's obviously a huge difference between the center of the Sun and the inside of a power plant on Earth—so how could we make nuclear fusion reactions happen in practice? It turns out that, instead of using ordinary hydrogen atoms, the best approach is to use other isotopes (different atomic forms) of hydrogen that are slightly heavier. An. The fusion process is only a subordinate part of the process producing heat and light in the Sun. The build up of a by-product of fusion, molecular motion, provides the primary source of energy in the Sun. The fusion process, which is maintained by very small amount of hydrogen mass

Fusion reactions in stars For many years the fuel source for the Sun was a mystery. It has long been known that the energy output of the Sun is very high, about 4 x 1026 W. if we assume that this energy comes from the chemical burning of hydrogen (the main constituent of all stars), with a Nuclear fusion in the Sun. The Sun shines because of fusion reactions similar to those envisioned for terrestrial fusion reactors. The basic solar process, called the proton-proton chain, is the fusion of four protons to form an alpha particle, two positrons (e+), and two neutrinos (); that is, 4p ! fi +2e+ +2 e (see table). The rate for. Sadly D-D fusion reactions do produce neutrons. In theory it is possible to use spin-polarized 3 He in the fusion fuel to absorb the neutrons. You will get less energy out of each gram of fusion fuel, but with the advantage of a lot less deadly neutron radiation Fusion creates other elements, but those require more energy than they produce. Most of the reactions in our sun are fusion of lighter elements, so the sun produces a surplus of energy overall. Still, it creates heavier elements, losing energy in the process, at a relatively much slower rate. People seem to equate fusion to energy is produced Best Answer: The ultimate conversion of the proton-proton chain (the primary method of producing helium through fusion in the sun) is 4p+ ---> 1He+2 + 2e+ + 2ne + energy p+ are protons, or hydrogen nucleii He+2 are alpha particles, or helium nucleii e+ are positrons, these will annihilate with electrons releasing more energ

Chain reactions create the energy in nuclear power plants, for instance, beginning from a small explosion -- the splitting of a single atom -- leading to all the atoms in the contained core splitting as the reaction spreads. This type of nuclear reaction is called fission. The energy in the sun, however, is the opposite type: fusion Proton-Proton Animation. Shows an animated diagram of the proton-proton chain reaction, which is the dominant fusion reaction in the sun's core. UNL Astronomy / ClassAction / Sun and Solar Energy / Animations. Usage Instructions Inside 0.24 solar radius, the core generates 99% of the fusion power of the Sun. There are two distinct reactions in which four hydrogen nuclei may eventually result in one helium nucleus: the proton-proton chain reaction - which is responsible for most of the Sun's released energy - and the CNO cycle

Fission vs. Fusion - What's the Difference? Duke Energy ..

How do we know the sun performs nuclear fusion? Back in the early 20th century, it was already known from geology that the Earth (and by extension, the Solar System) was at least hundreds of millions of years old. At the time, the leading theory of the Sun's power, gravitational collapse, only gave the Sun a lifespan of a few million years Fusion reactions (D is a shorthand notation for deuterium, H², and T is short for tritium, H³) Fusion powers the Sun and other stars, where the fuel is contained by the gravity of the fuel itself. In stars the size of the sun or smaller, the proton-proton chain predominates; in larger stars, the CNO cycle is the dominant reaction. Both of. Figure 9.20 PP-chain reaction used by the sun and lower mass stars to derive energy from the fusion of Hydrogen inot Helium. The CNO Cycle. At remperatures above 15 million K a much more efficient fusion reaction occurs. This is the Carbon-Nitrogen-Oxygen cycle (CNO for short). Our sun is just not hot enough to use the CNO cycle effectively That's the secret of the fusion reaction. Fusion reactions have an energy density many times greater than nuclear fission and fusion reactions are themselves millions of times more energetic. Where x≈4 for the Sun Explains why fusion reactions only occur in the core where density and temperature is highest. Eventually, all of the hydrogen will be used up in the core what then? Will discuss next class how structure of Sun changes when H is used up result is core compresses, heats up, and a new reaction start

nuclear fusion Development, Processes, Equations, & Facts

WHAT IS FUSION? Fusion isthe process that powers the sun and the stars.It is the reaction in which two atoms of hydrogen combine together, or fuse, to form an atom of helium. In the process some of the mass of th About This Quiz & Worksheet. With these tools, you will be assessed on the nuclear fusion occurring in our Sun and other stars, Einstein's E=mc^2, nuclear fission's contrast to nuclear fusion, and. To capture and control on Earth the fusion reactions that drive the sun and stars, researchers must first turn room-temperature gas into the hot, charged plasma that fuels the reactions