solar activiy

Magnetic feild

disturbs the solar atmosphere periodically. causes sun spots

coronal holes

where solar wind escapes, low density in the gas of the corona. particles escape the surface in solar wind earth gets hit with these particles.

Prominence

a arch of gas that is ejected from the atmosphere can disturb satellites and navigational systems.

nuclear fusion

the process by which hydrogen nuclei combine to form helium, releasing vast amounts of energy in the sun's core.

plasma

a bunch of protons and electrons.

sun

A medium sized star made of two elements hydrogen and helium the sun has a center called the core and plasma is in the.

Radiation Zone

the second layer of the sun and the thickest layer of the sun.

convection zone

the third layer of the sun 200,000 km thick

photosphere

the third layer of the sun where intermost layer of the suns atmosphere and the least energetic.

cromosphere

visible only during solar eclipse has the most radiation.

corona

the last layer of the sun emits x-rays during eclipse and has a 3 to 5 million kelvin temp.

solar wind

plasma flowing out can cause an aurora.

nuclear fission

a way that stars produce energy through and it plays a role in star evolution

apparent magnitude

classification system based on how bright a star appears to be does not take distance into account so cannot indicate how bright a star actually is.

absolute magnitude

brightness an object would have if it where placed at a distance of 10pc;classification system for steller brightness that can be calculated when the actual distance to a star is known.

Luminosity

energy output from the surface of a surface of a star per second measured in watts

Hertzsprung-Russell diagram

graph that relates stellar characteristics class mass temperature magnitude diameter and luminosity.

Main sequence

the hr diagram the broad diagonal band that includes about 90 percent of all stars and tuns from hot limomous stars on the upper left corner to cool dim stars in the lower right corner.

Nebula

protostar

neutron star

pulstar

supernova

black hole