☰ Contents · Astronomy

Asteroids, dwarf planets and comets

Lessons 42–43 · 2 lessons · M. Mamadazimov. Astronomy Grade 11, 1st edition. DAVR NASHRIYOTI, Tashkent, 2018
Answers are for parents and teachers.
1
An asteroid’s period of 11 h 55 min (715 min) shortened by 32 min. What is the new period in minutes? (715 – 32)
2
Halley’s comet was at perihelion in 1910. How many years until 1986?
3
A comet has T = 125 years. What is a in AU? (a³ = 15,625)
4
Why does a comet brighten as it nears the Sun?
5
Write the difference between a comet and an asteroid in one sentence.