American Museum of Natural History
- What is a Star?
- Lives of Stars
- Our Star: the Sun
- Space Weather: Storms From the Sun
- Interferometry: Sizing Up the Stars
- Neil deGrasse Tyson on Finding Krypton
- Stars Glossary
- Quiz: Stars
- Exploration Questions: Stars
- Answers to Exploration Questions: Stars
Chromosphere: A hot outer layer present in many stars, lying between the photosphere and the corona.
Convection: The rising of heated material and falling of cooled material in a region simultaneously heated from below and cooled from above, such as a pot of water about to boil or the interior of a star.
Convective Zone: A layer of a star, where convection occurs, producing turbulence. This turbulence generates the Sun’s magnetic field.
Core: The center of a star, where nuclear fusion generates intense energy.
Corona: The million-degree outermost layer of many stars, which is so hot that gas escapes the star’s gravity and flows out into space as a stellar wind.
Gravity: The force of attraction between any two masses.
Heliosphere: The extent of space effected by the Sun's magnetic field, which reaches past Pluto.
Hydrostatic Equilibrium: In a star, the balance achieved between the enormous outward pressure of gas heated by fusion and the inward pull of its own gravity.
Luminosity: The total amount of light that a star emits. Luminosity is not the same as brightness, which drops off with distance.
Magnetic Field: The force produced by moving, charged material, such as the turbulent, ionzed gas in a star's convective zone.
Mass: The amount of matter contained within a given object.
Neutron Star: A stellar remnant formed by a massive star when it explodes as a super nova at the end of its life.
Nuclear Fusion: The combination of light atoms such as hydrogen and helium into heavier ones, such as helium, carbon, and oxygen. This process releases intense energy.
Radiation: Energy that travels in the form of rays or waves (e.g. electromagnetic waves such as light, radio, X-rays, and gamma rays), or in the form of subatomic particles.
Solar Flare: A magnetic explosion on the Sun that produces storms in the solar wind and generates dangerous radiation.
Stellar Wind: A flow of high-speed gas ejected by stars. It is call the solar wind when referring to our Sun.
Want to join the conversation?
- what is a solar flare form a nuclear fusion?(2 votes)
- No, a solar flare is a large ejection of gases from the Sun. It gets its energy from nuclear fusion in the core of the Sun.(1 vote)