The History
The century when stars were discovered
What is the 19th century
These dark or bright bands in a star's spectrum reveal the elements present in its atmosphere
what is spectral lines
A hypergiant is the most type of this quality of all stars
What is the brightest/biggest luminosity star
This is the spectral type of a B5II star, indicating its temperature.
what is B5
These stars sit at the top of the spectral classification system, burn blue, exceed 30,000 K in temperature
what is an O type star
The man who named "Fraunhofer lines"
Who is Josef von Fraunhofer
the tool is commonly used to find Emission lines
what is a spectrometer
this star makes up 90% of our universe
what is a main sequence star
Used to categorize stars by their temperature and spectral lines, this classification includes types like O, B, A, and G.
What is a spectral type
M-type stars, the coolest and most common in the galaxy, shine with this color due to their low surface temperatures.
What is red
The man who discovered the dark lines in the rainbow spectrum
Who is William Wollaston
Emission lines in a star's spectrum are key to determining this, revealing which elements are present and their abundances.
what is star composition
A bright giant's luminosity symbol
What is II
The Sun is a classic example of this spectral type and luminosity type
What is a G2V
hese substellar objects fall into spectral types L, T, and Y, too cool to sustain hydrogen fusion but too massive to be planets.
what is a brown dwarf star
What scientists compared the Fraunhofer lines to
What is chemical fingerprints
These two elements dominate the Sun’s emission spectrum
what are hydrogen and helium
the types or classes of the most commonly used system when categorizing luminosity stars
what is Yerkes luminosity classes
This diagram plots stars by their luminosity and surface temperature, revealing patterns like the main sequence, red giants, and white dwarfs.
what is an HR diagram
This sequence of letters represents the order of stellar spectral types, ranging from the hottest (O) to the coolest (M), and is used to categorize stars by their temperature.
what is OBAFGKM