* Constellations are always visible: Constellations are groupings of stars that appear close together from Earth. They don't change throughout the year, though their visibility changes depending on where you are on Earth and the time of year.
* Different constellations are visible at different times: December is when some constellations are particularly prominent in the Northern Hemisphere (like Orion) but others are not.
* Zodiac constellations: You might be thinking about the Zodiac constellations. December is associated with Sagittarius and Capricorn, but these are not the only constellations visible in December.
To find out what constellations are visible in December, you can:
* Use a stargazing app: Many apps like Stellarium or SkySafari will show you the constellations visible at your location and time.
* Look up a star chart: Online resources and astronomy books can provide charts showing the constellations for different months.
* Visit a planetarium: Planetariums often have shows that highlight the constellations visible at specific times.