Anders Johan Lexell

High school (ages 12+)
Space & Astronomy

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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/anders-johan-lexell

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. When was Anders Johan Lexell born?December 24, 1740
2. Where was Anders Johan Lexell born?Åbo, Swedish Finland (now Turku, Finland)
3. When did Anders Johan Lexell die?December 11, 1784
4. What is the academic affiliation?Russian Academy of Sciences (66 papers published in 16 years)
5. What is the named in honor?Comet Lexell, asteroid 2004 Lexell, lunar crater Lexell
6. What was Anders Johan Lexell known for?He was a brilliant mathematician and astronomer who helped map the stars and solved tricky math puzzles about the sky.

Polygonometry: The branch of geometry concerned with the measurement of polygons and their properties.
Celestial Mechanics: The branch of astronomy that studies the motion of celestial bodies under the influence of gravitational forces.
Spherical Trigonometry: A branch of trigonometry dealing with the relationships between the angles and sides of spherical triangles.
Comet Motion: The study of the paths and behavior of comets as they orbit the Sun.