{"response":"{\"What is a Type Ia supernova?

A Type Ia supernova is like a firecracker that explodes when it gets too full.

Imagine you have a balloon, every time you blow it up, it gets bigger and bigger until poof! it pops. A Type Ia supernova works in a similar way, but instead of air inside a balloon, there's a special kind of star called a white dwarf, which is like a tiny, super-dense ball of matter.

This white dwarf is part of a pair with another star. Over time, the white dwarf eats material from its partner, it’s like a greedy kid who takes all the cookies from their friend. When it gets too full, it can no longer hold in the extra stuff, and boom! It explodes in a bright flash that can be seen from far away.

These explosions are so powerful that they can light up entire galaxies, like turning on a flashlight in a dark room. Scientists use them to measure how fast the universe is expanding, just like using a ruler to see how much something has grown.