AstroBackground

is an option that specifies the background style of an AstroGraphics map.

Details

The astro background of an AstroGraphics[prims,…] output is the actual map that appears underneath the primitives prims. A map like AstroGraphics[{},…] with no primitives will only show the astro background, and possibly auxiliary elements like astro grid lines.
AstroBackground values can be given as AstroBackgroundAstroStyling[skystyle] for any valid AstroStyling sky style. For named sky styles, such as "BlackSky" or "GalacticSky", AstroBackgroundAstroStyling["skystyle"] may also be given as AstroBackground"skystyle".
Possible sky styles include:

		"BlackSky"	stars and planets on black background
		"GalacticSky"	stars and planets on Milky Way image
		"WhiteSky"	stars and planets on white background

AstroBackgroundAutomatic uses the "BlackSky" sky style by default.
AstroBackgroundNone specifies that no astro background should be used, meaning no background regions are displayed.
AstroBackground takes precedence over Background in astro graphics.

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Sky map with the default astro background:

Use a background showing the Milky Way:

Show constellation illustrations and remove the equatorial, ecliptic and galactic planes:

Use the default background sky:

Use a background showing the Milky Way:

Use a white background sky in AstroGraphics:

Specify styling directives for constellation:

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