Minor planet

High school (ages 12+)
Space & Astronomy

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/minor-planet

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the total cataloged objects?1,472,966 (as of October 2025)
2. What is the scientific relevance?Provide data on solar system formation, planetary defense, and potential resource extraction
3. Why are minor planets called "minor"?They are called minor because they are smaller than the eight big planets and don’t dominate their orbit. Their gravity isn’t strong enough to sweep away other objects nearby.
4. Where do most minor planets live?Most live in the main asteroid belt between Mars and Jupiter. Many more are found beyond Neptune in the Kuiper Belt and scattered disc.

International Astronomical Union (IAU): The organization responsible for naming celestial bodies and defining astronomical terms.
Dwarf Planet: A celestial body orbiting the Sun that is massive enough to be rounded by its own gravity but has not cleared its orbital neighborhood.
Trans-Neptunian Object (TNO): Any minor planet whose orbit lies entirely beyond that of Neptune.