Procyon B, a white dwarf, has the same luminosity as Barnard's Star, a red dwarf. Procyon B is ___________ compared to Barnard's Star.
A. smaller and cooler.
B. smaller and hotter.
C. larger and cooler.
D. larger and hotter.
Answer:B
Procyon B, a white dwarf, has the same luminosity as Barnard's Star, a red dwarf. Procyon B is ___________ compared to Barnard's Star.
A. smaller and cooler. B. smaller and hotter. C. larger and cooler. D. larger and hotter.