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Astro - Ch 1 & 2

Across
The lowest energy level an electron can reside in an atom
The distance between two consecutive crests (or troughs) of the wave.
Dark gaps in a spectrum caused by atoms absorbing some of the photons through them.
A hypothesis that has passed all its tests and is established in some basic framework or set of equations.
Standard model for acceptable scientific investigations
Change in the wavelength of light caused by motion of the wave generator away or towards you.
An atomic model that explains the behavior of electrons in an Hydrogen atom
An educated guess
The graph of color versus the brightness at each color.
Easily recognizable parts of one or more constellations.
Down
Transitions between the second energy level and higher levels.
An object that absorbs all radiation and emits all radiation as well.
The distance light travels in one year.
Strange objects whose gravitational pull is so strong that nothing can escape it.
What happens to spectrum of objects receding from you.
The sky is divided into 88 of these.
A spectrum that changes smoothly from one color to the next
Lines that are locations in a spectrum where extra photons are present.
Lights sometimes behaves as a massless particle.
Preferred temperature scale of astronomers.