Explore the physics of planetary motion and gravity with this engaging Orbital Velocity Investigation worksheet, designed for middle school science, GCSE Physics, IGCSE Physics, MYP Science, AP Physics, and introductory astronomy courses. Using an interactive solar system simulation, students investigate the relationship between a planet’s distance from the Sun and its orbital velocity through real data collection, mathematical analysis, and graphing.

Students use the simulation to collect orbital distance and orbital period data for all eight planets in the solar system before calculating orbital velocity

The worksheet carefully explains how the simulation differs from reality — including simplified circular orbits, compressed distances, adjusted planet sizes, and accelerated time — while reinforcing that the simulation still accurately represents the relative relationships between orbital distance and orbital speed.

Students develop practical data analysis and scientific investigation skills by:
• Collecting and exporting simulation data
• Converting units and applying mathematical formulas
• Calculating orbital velocity using spreadsheet software
• Creating scatter graphs in Google Sheets
• Adding trend lines and interpreting graph patterns
• Identifying relationships between variables
• Using evidence to answer a research question

The activity also reinforces key physics and astronomy concepts, including:
• Orbital motion
• Gravity and gravitational attraction
• Circular motion
• Orbital period and velocity
• Scientific modelling and simulation limitations
• Data processing and graph interpretation

A major strength of this resource is its strong integration of mathematics and scientific inquiry. Students learn how orbital velocity is derived from orbital circumference and time period while exploring how gravity changes with distance from the Sun.

The worksheet also includes an extension investigation where students apply the same methods to moons orbiting planets such as Jupiter or Saturn, helping students recognise that the same gravitational relationships apply throughout the solar system.

What’s Included:
• Student investigation worksheet
• Background information on orbital motion and simulations
• Step-by-step instructions for data collection
• Spreadsheet processing guidance
• Orbital velocity calculations
• Graphing and trend line instructions
• Analysis and conclusion questions
• Extension task investigating moons and planets

This resource is ideal for:
• Astronomy and space science lessons
• Gravity and orbital motion units
• Physics data analysis practice
• STEM and inquiry-based learning
• Remote learning and virtual investigations
• Cross-curricular science and mathematics activities

Students finish the activity with a deeper understanding of how gravity controls motion in the solar system while building confidence in scientific investigation, graphing, mathematical modelling, and data analysis.