☰ Contents · Astronomy

Variable stars and stellar evolution

Lessons 54–55 · 2 lessons · M. Mamadazimov. Astronomy Grade 11, 1st edition. DAVR NASHRIYOTI, Tashkent, 2018
Answers are for parents and teachers.
1
If m – M = 15, then 5 lg d – 5 = 15, lg d = 4. How many parsecs is d?
2
A nova brightens by 15 magnitudes. By what factor does its brightness grow? (100 · 100 · 100)
3
R_s ≈ 3 km · M / M☉. What is it for M = 5 M☉? (km)
4
How would you rank white dwarf, neutron star and black hole by progenitor mass?
5
Where and when was SN 1987A recorded?