What is below Earth, since space is present in every direction?

Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond.

By: Jeff Moersch, University of Tennessee, The Conversation

Outlets: The Conversation

Published: January 12, 2026

Words: 1,177

Last Updated: 1 week, 6 days ago

By Jeff Moersch, University of Tennessee

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to CuriousKidsUS@theconversation.com.

What is below Earth, since space is present in every direction? – Purvi, age 17, India

If you’ve seen illustrations or models of the solar system, maybe you noticed that all the planets orbit the Sun in more or …

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