Level 1

Student Article

Is Our Universe Stranger Than We Thought?

By: Marcus Chown
Originally Published in  
Science Focus
Illustration of two celestial planets
© Getty
Vocabulary

Universe (noun): Everything that exists: space, stars, planets, and more.

Telescope (noun): A tool that helps us see faraway things in space.

Dark matter (noun): Something scientists think is in space, but they can’t see it.

The Universe is the name for everything — stars, planets, space, and even time. For a long time, scientists thought they understood how the Universe works. But now, they are seeing some strange things.

Galaxies are moving in strange ways

When scientists use special space telescopes, they see galaxies and stars moving in ways they didn’t expect. It’s like the Universe is acting funny, and no one is sure why. Some stars are too bright. Some galaxies are moving too fast. This is confusing to the scientists.

Is something missing from our models?

They wonder if something is missing from their ideas. Maybe there is something we can't see, like dark energy or dark matter, changing how the Universe works. Or maybe their math is wrong.

Big questions lead to big discoveries

The more scientists study the Universe, the more questions they have. But that’s okay! Asking questions is how we learn more. Space is big and full of surprises.

© Marcus Chown / Our Media