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Glowing, dancing curtains of light in the upper atmosphere of a planet. Auroras are caused by the interaction between the planet’s magnetic field and charged particles from Earth’s magnetosphere. Auro [..]

They are caused by streams of charged particles in the magnetotail that are accelerated to high energies and collide with atoms in the upper atmosphere surrounding Earth's poles. This interaction [..]

The irregular layer of the solar atmosphere that is located above the photosphere and beneath the corona. The temperature in the chromosphere rises from 6000° C to about 20,000° C. It is hotter than t [..]

The innermost part of the Sun. The core produces colossal amounts of energy, including all of the Sun's light and heat. The temperature and pressure are so great in the Sun’s core that hydrogen a [..]

An area of the corona which appears dark in X-rays and ultraviolet light. They are usually located at the poles of the Sun, but can occur in other places as well. The magnetic field lines in a coronal [..]

High energy charged particles traveling through interstellar space at nearly the velocity of light. Most are produced in supernova explosions.

The entire range of all the various kinds or wavelengths of electromagnetic radiation or light, including (from long to short wavelengths): radio, infrared, visible, ultraviolet, X-rays and gamma rays [..]

The splitting of heavier atomic nuclei into lighter ones. In the case of heavy atoms (e.g., uranium, plutonium), this will release energy. Fission is how nuclear power plants produce energy.

An ion is an atom which has lost or gained one or more electrons so that it has a net electrical charge. Normally atoms have equal numbers of negatively charged electrons and positively charged proton [..]