Sentences with phrase «by nuclear fusion»

One possibility is a rocket powered by nuclear fusion, essentially a sequence of hydrogen bombs.

According to theory, that is the kind that should be generated by the nuclear fusion of hydrogen in the sun.

All main sequence stars have a core region where energy is generated by nuclear fusion.

When the energy released by the nuclear fusion in these giant stars no longer balances the contracting force of gravity, the whole star can suddenly fall in on itself, triggering a cataclysmic explosion.

On the other hand, «heavy» elements such as carbon and oxygen are synthesized by nuclear fusion reactions in stars.

Because all elements in the universe heavier than hydrogen, helium, and lithium have been forged by nuclear fusion in the cores of stars and then scattered into space by supernova explosions, the find indicates that the galaxy, at the age we're now observing it, was old enough for at least one generation of stars to have formed, lived, and died.

One of the most exciting ideas proposed by Freese is that the universe's first stars were powered not by nuclear fusion, but by the annihilation of dark matter particles.

On to Proxima Centauri Under these circumstances, Laughlin believes the continued survival of our species will depend on the development of high - occupancy starships propelled by nuclear fusion or matter - antimatter annihilation that can transport people rapidly to planets orbiting other stars.

The team, from Australia and the US, calculated the star's mass from the abundance of the cobalt isotopes created by nuclear fusion in the supernova.

Oxygen came later, as massive stars formed and made heavier and more complex elements by nuclear fusion in their interiors and also in their explosive deaths, ultimately creating a universe of countless oxygen - rich galaxies like our Milky Way.

For stars with less than 0.23 solar masses, [16] energy generation by nuclear fusion comes to a halt and it becomes a white dwarf.

Plasma churns and pulls in different directions around the sun, and the enormous heat produced by the nuclear fusion at the core plays along these currents to create magnetic fields.

The temperature at its core has been estimated about 15,000,000 K. Energy is produced in its core by nuclear fusion, converts hydrogen atoms and releases huge amounts of energy.

Stars are fueled by the nuclear fusion of hydrogen into the slightly denser and heavier element helium.

Heavier elements are believed to have been formed later, by nuclear fusion reactions in stars.

I believe that the sun is powered by the nuclear fusion of hydrogen in to helium, because the spectrum of the emitted light is exactly as predicted by theory and tested by experiment on earth.

Stars are powered by nuclear fusion, converting hydrogen into helium in their cores.

Objects heavier than 70 Jupiter masses are not cold enough to be brown dwarfs, implying that they are all stars powered by nuclear fusion.

This mechanism provided ages of the Sun that were much smaller than what is observed in the geologic record, and was rendered obsolete by the discovery that stars are powered by nuclear fusion.

This means that it generates its energy by nuclear fusion of hydrogen nuclei into helium and is in a state of hydrostatic balance — neither contracting nor expanding over time.