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astronomy vocab

Across
the magnitude of a celestial object as it is actually measured from the earth.
a large, irregularly shaped object in space that orbits our Sun.
the graph showing the absolute magnitude plotted against the surface temperature for a group of stars.
a fixed luminous point in the night sky that is a large, remote incandescent body like the sun.
the graph showing the absolute magnitude plotted against the surface temperature for a group of stars.
the range of wavelengths or frequencies over which electromagnetic radiation extends.
The whole of all matter, energy, planets, galaxies and space
An apparent change in the frequency of waves, as of sound or light, occurring when the source and observer are in motion relative to each other
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 magnitude of a celestial object as it would be seen at a standard distance of 10 parsecs.
a shift toward longer wavelengths of the spectral lines emitted by a celestial object that is caused by the object moving away from the earth.
a continuous and distinctive band of stars that appears on plots of stellar color versus brightness.
The universe originated billions of years ago in an infinite energy destiny
the displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving toward the observer.
a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.
A small, icy object that orbits the sun and has a long "tail" of gas
a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.