Extreme trans-Neptunian object

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/extreme-trans-neptunian-object

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 scientific classification?Extreme trans-Neptunian object (ETNO)
2. What is the primary habitat?Scattered Disk and potentially more distant regions, beyond the main Kuiper Belt
3. What is an extreme trans‑Neptunian object?An extreme trans‑Neptunian object, or ETNO, is a tiny icy world that lives far beyond Neptune, usually more than 150 times farther from the Sun than Earth is.
4. Why are ETNOs called "extreme"?They are called "extreme" because they are very far from the Sun and have unusual, wiggly or tilted orbits that are different from most other objects in the Kuiper Belt.

Astronomical Unit (AU): The average distance between the Earth and the Sun, approximately 93 million miles (150 million kilometers).
Planetesimal: Small celestial bodies that are thought to have formed from the accretion of dust and gas in the early solar nebula.
Protoplanetary Disk: A rotating disk of dense gas and dust surrounding a newly formed star, from which planets eventually form.
Spectroscopy: The study of how matter interacts with electromagnetic radiation, used to determine the chemical composition of distant objects.