Edexcel IGCSE Physics · Spec 8.1-8.6
The Solar System, Gravity and Orbits
Covers place the solar system within the Milky Way and universe, Explain how mass and distance affect gravitational fields and Compare circular, elliptical and artificial-satellite orbits.
Physics revision video
The Solar System, Gravity and Orbits
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Spec 8.1-8.6
What you need to know
- Place the solar system within the Milky Way and universe
- Explain how mass and distance affect gravitational fields
- Compare circular, elliptical and artificial-satellite orbits
Active recall
Quick check
Answer each question before opening the answer.
Which galaxy contains the solar system?
The Milky Way
How does gravitational field strength change with distance?
It decreases as distance increases
When is speed constant in the simplified orbit model?
In an ideal circular orbit
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