Astronomical units and Kepler’s laws
Answers are for parents and teachers.
1
How many million km does light travel in one hour? (300,000 · 3600 : 1,000,000)
1080
2
If a = 16 AU, how many years is T? (T² = 16³ = 4096)
64
3
If T = 8 years, a³ = 64. What is a in AU?
4
4
For an orbit with a = 5 AU and e = 0.2, what is the aphelion in AU? (5 · 1.2)
6
5
Why do we see a star 30 light-years away as it was 30 years ago?
Because its light took 30 years to reach us.