Heliosphere

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/heliosphere

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 outer boundary?The heliopause, where the solar wind pressure balances interstellar medium pressure
2. What is the key regions?Includes the termination shock, heliosheath, and heliotail
3. How does the Sun create the heliosphere?The Sun sends out a stream of charged particles called the solar wind. This wind pushes outward and carves out a cavity in the space around us. The pressure of the wind balances the pressure of the gas in the Milky Way.
4. Why is the heliosphere shaped like a comet?The Sun moves through space, so the heliosphere is round in the direction it is moving but stretches into a long tail behind it. The tail can be thousands of astronomical units long.

Solar Wind: A continuous outflow of charged particles from the Sun's corona, shaping the heliosphere.
Interstellar Medium: The diffuse matter and radiation existing in the space between stars within a galaxy.
Termination Shock: The region where the supersonic solar wind abruptly slows down due to external pressure.
Heliopause: The outermost boundary of the heliosphere, separating solar wind plasma from interstellar plasma.