19P/Borrelly

High school (ages 12+)
Space & Astronomy

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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/19pborrelly

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. How deep is 19P/Borrelly?Approximately 3,400 kilometers. This was the closest approach to the comet's nucleus
2. What is the official designation?19P/Borrelly. The '19P' signifies it is the 19th periodic comet discovered
3. What is the last perihelion date?February 1, 2022. The date of its closest approach to the Sun
4. What is Comet 19P/Borrelly?Comet 19P/Borrelly is a dusty snowball that orbits the Sun every 6.85 years. It is a Jupiter‑family comet that shows what the early solar system was like.
5. How often does Borrelly visit the inner solar system?It comes close to the Sun about every 6.85 years, with its last close approach on February 1, 2022, and the next one expected on December 11, 2028.

Solar Nebula: The giant cloud of gas and dust from which the Sun and planets formed.
Perihelion: The point in an object's orbit where it is closest to the Sun.
Sublimation: The process where a solid turns directly into a gas without becoming a liquid first.
Geometric Albedo: A measure of how much light an object reflects directly back towards the source.