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THE ORBIT OF A COMET - University of St Andrews
Why do comets have such eccentric orbits? | Astronomy.com
elliptical orbit - Encyclopedia Britannica
Comets: Everything you need to know | Space
Why Comets Are Important - NASA Solar System Exploration
What Is a Comet? | NASA Space Place – NASA Science for Kids
The Comet's Tale: Orbits - University of California, Berkeley
The Path of a Comet - How Comets Work - HowStuffWorks
Comet Orbits | Solar System | Space FM
Comet: Definition, Tails, Facts, Orbit, Visibility, Difference