K2-18b

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/k2-18b

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.

Sub-Neptune: An exoplanet category larger than Earth but smaller than Neptune, often with thick hydrogen atmospheres.
Habitable Zone: The orbital region around a star where conditions might allow for liquid water on a planet's surface.
Transmission Spectroscopy: A technique analyzing starlight filtered through an exoplanet's atmosphere to determine its composition.
Hycean Planet: A theoretical exoplanet type characterized by a deep liquid water ocean beneath a hydrogen-rich atmosphere.