### star:

Bright star
* Many bright stars are in the sky.
* Most bright stars have many names.
* appear larger on the sky chart than dim stars.
* are an important cause of intense brightening of the background light
  - close, and faint stars are farther away
  - far away and dim stars are close
* look like small comets.

Central star
* Many central stars are known from their spectra to be very hot.
* Some central stars have surfaces in which no hydrogen remains, some have no helium either.

Circumpolar star
* All circumpolar stars are within the circumpolar circle.
* appear to circle around a point called north celestial pole.
* cross the meridian twice each day without setting below the horizon.

Cluster of stars
* Clusters of stars consist of stars which are all approximately the same age.
* Most clusters of stars are relatively young.

Cool star
* are red or orange
  - redish-orange in color
* have fewer atomic collisions and have weaker absorption lines
  - less atomic collisions and have weaker absorption lines
* radiate most of their energy in the infrared.

Different star
* are visible at northern and southern latitudes.
* display a bewildering variety of absorption spectra.
* have different brightnesses and colours
  - intensities at ultraviolet wavelengths

Dwarf star
* Some dwarf stars are smaller than the Earth.
* come in many different colors.

Earth star
* are the only type of fungus that can move.
* grow almost flat against the ground and resemble brightly colored starfish.

Giant star
* Some giant stars are things in the Tarantula Nebula.
* lie above the main sequence.

Hexagram
* are stars.
* represent all possible worst case scenarios.

Hot star
* appear blue because most energy is emitted in the bluer parts of the spectrum
  - blue, while cooler stars appear reddish-orange
  - bluer than cooler stars
* are bluer, while cooler stars are red
  - typically blue in color while cool stars are red
  - white
* emit a great deal of ultraviolet radiation.

Hotter star
* are blue, and cooler stars are red
  - more blue in color, cooler stars are more red
  - white or even blue and cooler stars are orange or red
* have higher peak amplitudes, and peak at shorter wavelengths
  - more blue in their spectrum while cooler stars radiate more in the red end
* shine in the bluish areas of the spectrum
  - with more blue light

### star:

Large star
* are often very luminous and hot, and so appear blue.
* burn hotter and more quickly than do smaller ones
  - their fuel fast and have short lives
* can fuse atoms as large as iron, but can go no further.
* lose their matter relatively easily.
* tend to have higher core temperatures than smaller stars.
+ Variable star, Intrinsic variable stars, Eruptive variables, Giants and Supergiants
  * Large stars lose their matter relatively easily. Variability due to eruptions and mass loss is fairly common among giants and supergiants.

Larger star
* are Giants for even shorter lengths of time.
* burn out faster than the smaller ones such as the sun
  - their fuel faster

M star
* are cool and faint
  - red and cold
  - the coldest and O stars are the hottest in stellar classification
+ Stellar classification: Stars :: Astrophysics
  * M stars are the coldest and O stars are the hottest in stellar classification. These stars are from the main sequence.