Orbital revolution

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/orbital-revolution

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 governing principle?Newton's Law of Universal Gravitation and conservation of angular momentum
2. What is the key scientific texts?'De revolutionibus orbium coelestium' by Copernicus, 'Principia Mathematica' by Newton
3. Why does Earth take about 365 days to orbit the Sun?Earth's orbital period is about 365.25 days, and that length of time makes up one year on our calendar.
4. How does the speed of a planet change with its distance from the Sun?Planets that are closer to the Sun move faster, while those farther away move slower.

Centripetal Force: A force that acts on a body moving in a circular path, directing it towards the center.
Heliocentric Model: A cosmological model in which the Sun is assumed to be at the center of the universe.
Kepler's Laws of Planetary Motion: Three laws describing the motion of planets around the Sun, including elliptical orbits.
Exoplanet Detection: Methods used to find planets orbiting stars outside our solar system, often via orbital effects.