Surprise! The Big Dipper Is an Asterism, Not a Constellation

While you might think that the Big Dipper is a constellation, this is actually not the correct name for it; instead, the Big Dipper should be called an "asterism," which is a prominent pattern of stars in the sky.

Some asterisms are all within one constellation, such as Orion's Belt within the constellation Orion, whereas others are made up by stars in different constellations such as the Summer Triangle, which is comprised of Vega (in the constellation Lyra), Deneb (in Cygnus) and Altair (in Aquila).

In the case of the Big Dipper, it is located entirely within the constellation Ursa Major, or the Great Bear. This is a prominent constellation in the northern hemisphere — in fact, it is a circumpolar constellation, meaning it always circles around the north star, Polaris, which is bright, but not the brightest star in the heavens.

The Big Dipper has been named by people for as long as we've been looking skyward; nobody is credited with "discovering" or "naming" the Big Dipper. In fact, not everyone even calls it by that name.

While those of us in North America might call it the Big Dipper because it looks like a ladle with a handle, this is not the only name for such a prominent group of stars. In the United Kingdom, it's called the Plough, whereas the Germans call it the Großer Wagen or "Great Wagon." Romanians and many other Slavic language speakers also refer to it as the "Great Wagon" in their languages.

To the Samí people of northern Scandinavia, it is referred to as Fávdnadávgi ("Fávdna's bow") or simply dávggát ("the bow"), referring to the great hunter Fávdna (the star Arcturus).

In early Chinese astronomy records, it is referred to as Beidou, or "northern dipper," whereas Filipino speakers might call it tabo, referring to the one-handled water pot used ubiquitously in Filipino households and bathrooms for purposes of personal hygiene.

All this to say, many people refer to it in a name that is both familiar to them because of its shape, or part of their cultural mythology — and this is where many of the constellations get their stories too.

If you want to spot the Big Dipper, you'll need to be in the northern hemisphere — above the equator — and have a view of the northern sky; the further north you are, the higher the Big Dipper will appear once the sun goes down. All the stars of the Big Dipper are visible no matter what time of night or time of year, as long as you have a clear northern horizon.  

You'll want to look for four bright stars that make a near rectangle; these are the "bowl" of the dipper, and then you need to find the "handle."

Also keep in mind seasonality: astronomers use the phrase "spring up and fall down" to remember where to look for the Big Dipper. This is because the Big Dipper changes orientation throughout the year.

In the fall, the Big Dipper rests on the horizon in evening. In the winter, the handle appears to be dangling from the Big Dipper bowl. You will find the Big Dipper upside down in the spring and, in the summer, the bowl leans our pours out toward the ground.