ELI5: Explain Like I'm 5

Initial mass function

An initial mass function is like a menu for baby stars. Just like when you go to a restaurant, you have a lot of options to choose from, baby stars also have different options for their size.

Some baby stars are like tiny appetizers, while others are like big entrees. The initial mass function tells us which size of baby stars are more common than others.

Scientists have found that there are more small baby stars than big baby stars. It's like how there are more appetizers on a restaurant menu than entrees.

So, the initial mass function helps us understand how many small and big baby stars we should expect to find. And just like how we can choose which dish we want to order at a restaurant, baby stars also have different sizes depending on what they're made up of and the conditions they form in.