Constellations are made up of stars. However, it's important to remember that these stars are not actually close together in space. They just appear to be close together from our perspective on Earth due to our line of sight.

Here's a breakdown:

* Stars: These are massive balls of hot gas that emit light and heat.

* Distance: The stars in a constellation can be millions of light-years apart.

* Perspective: We see the stars as being close together because we view them from Earth, which is millions of light-years away from them.

Think of it like looking at a bunch of streetlights from a distance. They might appear to be grouped together, even though they are actually quite far apart.

The constellations we see are simply patterns that have been named and recognized by humans throughout history. These patterns are formed by the random distribution of stars in the night sky, but they are not physically connected in any way.

It's also worth noting that constellations are not universal. They are based on our Earthly perspective, so if you were on a different planet, the constellations would look different.