Universe - Study Mode

[#96] The brightest star in the sky is ________
Correct Answer

(D) Sun

Explanation

Solution: The Sun is the brightest start during the days, because it's the nearest star to us.

[#97] Lunar Sea refers to ________
Correct Answer

(C) A dark plain on the moon

Explanation

Solution: The lunar maria are large, dark, basaltic plains on Earth's Moon, formed by ancient volcanic eruptions. They were dubbed maria, latin for "seas", by early astronomers who mistook them for actual seas.

[#98] The surface temperature of the Sun is measured
Correct Answer

(A) 6000°C

Explanation

Solution: The fact that the outermost region of the sun's atmosphere is at millions of degrees while the temperature of the underlying photosphere is only 6,000 kelvins (degrees C. above absolute zero) is quite nonintuitive.

[#99] Which planet looks reddish in the night sky?
Correct Answer

(C) Mars

Explanation

Solution: Planet Mars looks reddish in the sky. It is due to the ferric oxide(Rusted iron) on the martian surface.

[#100] How many days in one year on mercury?
Correct Answer

(B) 88

Explanation

Solution: Being nearest to Sun,its path around Sun is smallest. Hence its one year is equal to 88 days. 59 days spent on Earth are equivalent to 1 day spent on Mercury as days there bigger than the days on earth.