GK
SOLAR SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
True, because Star #2 is smaller.
|
|
|
False
|
|
|
True because Star #1 is closer.
|
|
|
None of the above
|
Detailed explanation-1: -A star classed as a supergiant may have a diameter several hundred times that of the Sun and a luminosity nearly 1, 000, 000 times as great. Supergiants are tenuous stars, and their lifetimes are probably only a few million years, extremely short on the scale of stellar evolution.
Detailed explanation-2: -A giant star is a star with substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature. They lie above the main sequence (luminosity class V in the Yerkes spectral classification) on the Hertzsprung–Russell diagram and correspond to luminosity classes II and III.
Detailed explanation-3: -Arcturus is a red giant star in the Northern Hemisphere of Earth’s sky and the brightest star in the constellation Boötes (the herdsman). Arcturus is also among the brightest stars that can be seen from Earth.