shape or an object assigned by humans.

Since# prehistoric times, humans have been using the## stars to help navigate and find their way# across the Earth.

The first evidence that## shows constellations were being used in this# way is from 17,000-year-old cave art.

Many## different ancient cultural groups have defined# constellations in their own way throughout time;## however, modern constellations, they come from# ancient Greek sources.

The 88 constellations## in our sky were formally established by the# International Astronomical Union 100 years## ago.

Standard constellations, they're like a shared# language.

It makes astronomical observations and## identifications so much easier.

For example,# the super massive black hole in the middle## of our galaxy.

It's called Sagittarius A star, which means when you look in the sky, you can## find its position by looking in the boundaries# of the constellation Sagittarius.

Overall, while## constellations aren't as useful for night# sky navigation as they were in ancient times,## they're still an important part of astronomy.

Not# to mention, knowing which ar If you're interested in seeing# different constellations in the night sky,## there are a couple of tips to factor in.

First,# the constellat the time of the year because Earth is in a# different spot in its orbit throughout the## year, so the stars are going to move slightly# west every night.

Also, where you are on the## planet matters too.

Since the Earth is tilted# a bit, those who are in the Northern Hemisphere## are going to get a slightly different view of# the stars than those who live in the Southern#Hemisphere.

In the northern sky, many people use# the North Star to orient themselves, known as## Polaris.

You can find it using the Big Dipper,# but fun fact, the Big Dipper not actually a## constellation.

It's an asterism.

Asterisms are# also patterns of stars, but they're usually## smaller than constellations and take up parts# of them.

They aren't recognized as one of the## 88 constellations.

The Big Dipper is actually# part of the constellation, Ursa Major the Great#Bear.

After orienting yourself under the night# sky, you can find your favorite constellations## and you can really get stargazing.

If you want# more tips and tricks on what to look for whe stargazing, check out our weekly Star Gazers# videos and as always, keep looking up!## For more Star Gazers, click the video below.

Don't# leave me hanging.

Come on, click it, click it.