18 pictures show how profoundly large our cosmos is

Cosmically, humanity is a mere drop in the Universe’s vast ocean.

Our civilization’s entire experience — excepting spaceflight — is confined to our planet: 13,000 km across.

Even other planets routinely occupy volumes thousands of times greater than Earth.

Stars barely outsize the largest planets, but frequently get much larger.

The biggest supergiant stars have diameters exceeding billions of kilometers.

They’re comparable in scale to the heaviest supermassive black holes’ event horizons.

But even the largest individual objects are no match for extended, aggregate systems.

Surrounding every stellar system, Oort-like clouds span multiple light-years: tens of trillions of kilometers.

The stars themselves cluster together into great galactic assemblages.

The tiniest galaxies possess thousands of stars, spanning hundreds of light-years.

The largest galaxies contain over 100 trillion stars.

Quasar jets are larger still: Porphyrion spans an unprecedented 24 million light-years.

On even larger scales, galaxies cluster together, forming structures up to hundreds of millions of light-years across.

The largest superclusters, voids, and filaments — although not gravitationally bound — extend for 1.4 billion light-years.

Overall, our observable Universe measures 92 billion light-years.

But the unobservable Universe must be at least hundreds of times larger.

For all we know, the Universe may even be infinite.

Mostly Mute Monday tells an astronomical story in images, visuals, and no more than 200 words.

This article was first published in May of 2022. It was updated in September of 2026.

This article is featured on Big Think.