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3/5-3/10 Mr. Mathews eighth period. Danielle Curtis

Across
a unit of length used informally to express astronomical distances
Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with absorption lines
the place or point where a muscle, nerve, or other body part arises, in particular
a cloud of gas and dust in outer space, visible in the night sky either as an indistinct bright patch or as a dark silhouette against other luminous matter.
Down
the intrinsic brightness of a celestial object (as distinct from its apparent brightness diminished by distance).
A graphical tool that astronomers use to classify stars according to their luminosity, spectral type, color, temperature and evolutionary stage.