Universe - Study Mode

[#111] A black hole is a ________
Correct Answer

(A) Contracted star with intense gravitational pull

Explanation

Solution: Black hole, cosmic body of extremely intense gravity from which nothing, not even light, can escape. A black hole can be formed by the death of a massive star. They are regions of space where gravity is so powerful that even light can't escape.

[#112] Messenger satellite has been launched by NASA for the study of
Correct Answer

(A) Mercury

Explanation

Solution: "MESSENGER" was a robotic spacecraft sent by NASA.
The name is a reference to the messenger deity of the same name from Roman mythology was a NASA robotic spacecraft that orbited the planet Mercury between 2011 and 2015. The probe was launched aboard a Delta II rocket in August 2004 to study Mercury's chemical composition, geology, and magnetic field.

[#113] Which of the following is indicated by the colour of a star?
Correct Answer

(C) Temperature

Explanation

Solution: The color of a star mostly indicates a star's temperature, and it can also suggest the star's age. Class O stars, which are blue in color, are the hottest, and class M stars, which are red in color, are the coldest.

[#114] Milky Way Galaxy was first seen by
Correct Answer

(A) Galileo

Explanation

Solution: Galileo Galilei first resolved the band of light into individual stars with his telescope in 1610. Until the early 1920s, most astronomers thought that the Milky Way contained all the stars in the Universe.

[#115] Halley's comet appears once in a period of ________
Correct Answer

(C) 76 years

Explanation

Solution: Halley's comet will next appear in the night sky in the year 2062. It orbits the sun every 75-76 years, so this is the time between appearances. Halley's comet was recorded by Edmund Halley in 1682. It was seen again in 1758, 1835, 1910, and 1986.