Simplified picture of the Carbon-Nitrogen-Oxygen
University of Oregon
The Carbon-Nitrogen-Oxygen Fusion Cycle
When the temperature of the core of a star reaches about 16 million
(that's REALLY hot!), Helium is made through another fusion cycle. This cycle is named the Carbon-Nitrogen-Oxygen (CNO) cycle. Here Carbon gets the cycle going, but it is not used up.
Watching the movie below may help you to understand this process.
Shop Windows to the Universe Science Store!Cool It!
is the new card game from the Union of Concerned Scientists that teaches kids about the choices we have when it comes to climate change—and how policy and technology decisions made today will matter. Cool It! is available in our online store
You might also be interested in:
Fusion in the core of stars is reached when the density and temperature are high enough. There are different fusion cycles that happen in different phases of the life of a star. These different cycles...more
In the basic Hydrogen fusion cycle, four Hydrogen nuclei come together to make a Helium nucleus. This is the simple version of the story. There are actually electrons, neutrinos and photons involved in...more
Neutron capture can occur when a neutron approaches a nucleus close enough for nuclear forces to be effective. The neutron is captured and forms a heavier isotope of the capturing element. When the new...more
A Supernova is a very massive star that explodes at the end of its life. The supernova is where the heavy elements (heavier than iron) are made. ...more
The Sun acts like it has a big magnet in the middle of it. We call this the Sun's magnetic field. The Sun's magnetic field has a fancier name, the Interplanetary Magnetic Field (IMF). This just means that...more
The center of an atom is called the nucleus. Nuclei is the plural of nucleus. When two atoms come together, and their nuclei combine, you have fusion. Fusion releases energy. By using Einstein's famous...more
The theory of relativity states that no particle can travel at the speed of light in a vacuum. However, light travels at lower speeds in dense media, like water. A particle traveling in water must have...more
Neutrino interactions with matter are extremely rare, so detecting a neutrino is very hard. Neutrino detectors are typically large, underground tanks filled with a fluid that reacts to neutrinos. In neutrino...more