What is stellar-mass?

Stellar-mass is how heavy a star is compared to our Sun.

Imagine you're playing with blocks. Each block has a certain weight, some are small like your toy cars, and others are big like the bricks you stack to build towers. Now think of stars as giant blocks in the sky. The stellar-mass tells us how many "Sun-sized" blocks a star is made of.

If our Sun were one block, a star with a stellar-mass of 2 would be like having two of those blocks stacked on top of each other, pretty heavy!

Some stars are tiny, maybe just a little bigger than our Sun. Others are huge, like if you had hundreds or even thousands of those blocks all together.

Just like you can have a small block or a big tower of blocks, stars come in many sizes, and their stellar-mass helps scientists know how big they are.

So next time you're playing with blocks, remember: you're doing what astronomers do every day, just with toys!