Stars

Front

When you divide the incoming light from an object into individual colors or wavelengths it's called ___

Back

a spectrum

Front

Hot objects, that emit light at all wavelengths, are said to give off ___

Back

a continuous spectrum

Front

The continuous spectrum of a star has gaps in it, darker bands where different elements ___

Back

absorb different colors

Front

In 1901, who developed a system to classify stars using many different absorption lines in their spectra?

Back

Annie Jump Cannon

Front

Which physicist showed how objects emit light of different colors based on their temperature?

Back

Max Planck

Front

Hotter stars put out more light at the blue end of the spectrum, while cooler ones peak ___

Back

in the red

Front

Cecelia Payne-Gaposchkin showed that the spectra of stars depended on their ___

Back

temperature and elements in their atmospheres

Front

Payne-Goposchkin showed that stars were overwhelmingly composed of ___

Back

hydrogen

Front

The classification scheme used today arranges stars by ___: their size, assigning each a number; their size, assigning each a letter; their temperature, assigning each a number; their temperature, assigning each a letter.

Back

their temperature, assigning each a letter

Front

The letters 'O', 'B', 'A', 'F', 'G', 'K' and 'M' arrange stars in order from ___

Back

hottest to coolest