Stars
What is an area of cooler temperatures on the Suns surface
Sunspot
What are groups of stars called?
Constellations
What is the name of the process by which stars change over time?
Stellar Evolution
What is small and extremely dense object that remains because gravity is so immense that nothing, not even light can escape it.
Black hole
Visible light arranged according to wavelengths
Spectrum
Nuclear Fusion
Unit of measurement used to express the energy emitted per second
Watt
What two things increase towards the center of a star?
Temperature and Density
What is a collapsed stellar remnant?
Neutron Star
Section of the HR diagram where 90% of stars fall
Main Sequence
What are violent eruptions of particles and radiation from the surface of the Sun
Solar Flares
Parallax
What is the first stage of a stars life?
Nebula
If the temperature is high enough ___________ can react with helium to form oxygen, then neon, then magnesium, and then silicon.
Carbon
What goes on the y axis on a HR diagram?
absolute magnitude
What is the equal pressure in (gravity) and out (nuclear fusion reactions) on the sun called?
Hydrostatic Equilibrium
What is the term used to describe how bring a star would appear if it were placed at a distance of 10pc?
Absolute Magnitude
Why is a white dwarf stable even thought it lacks nuclear reactions?
It is supported by the resistance of electrons being squeezed together and does not require a source of heat to be maintained.
As long as the star is stable and converting hydrogen to helium, it is considered a _____________________
Main sequence star
What characteristic of the sun controls the motions of the planets?
The Mass of the Sun
How hot are the white-hot areas on the surface of the sun? in Kelvin!
6000K
A parsec is equal to how many light years?
3.26ly
What is a star called that has a pulsating pattern of light?
pulsar
What is the order of life for a large star?
Stellar Nebula, Massive star, Red Supergiant, Supernova, then either a neutron star or a black hole
Which is the difference between a continuous, absorption and a emission spectrum?
Continuous is uninterrupted light going through a prism showing all 7 colors all the time. Absorption is light from the sun through a cloud of gas that shows dark bands were the elements in the gas cloud absorb the light and emission is burning or other light source through a cloud of gas that shows color bands on a dark spectrum where the elements emit color.