Q46) Recently NASA announced the discovery of an Earth-like cousin planet “Kepler-452b”. Regarding this, consider the following statements:

1) It was discovered by NASA’s Hubble Telescope

2) It was discovered in a habitable zone-the area around a star where liquid water could pool on the surface of an orbiting planet - of a G2-type star, like our sun

3) It is larger than the Earth.

Which of the statements given above are correct?

Only 1 & 2

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Only 2 & 3

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Only 1 & 3

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All of the above

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Solution

The correct option is B
Only 2 & 3

Ans:46)(b)Expl: NASA's Kepler mission has confirmed the first near-Earth-size planet in the “habitable zone” around a sun-like star. The newly discovered Kepler-452b is the smallest planet to date discovered orbiting in the habitable zone-the area around a star where liquid water could pool on the surface of an orbiting planet - of a G2-type star, like our sun.

While Kepler-452b is larger than Earth, its 385-day orbit is only 5 percent longer. The planet is 5 percent farther from its parent star Kepler-452 than Earth is from the Sun. Kepler-452 is 6 billion years old, 1.5 billion years older than our sun, has the same temperature, and is 20 percent brighter and has a diameter 10 percent larger.

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2. Consider the following statements, regarding the newly discovered exoplanet system,

1] Unlike in the case of our solar system, the planets have apparently formed far away from its star and gradually migrated towards it.

2] Since the initial discovery of three planets was made using the Chile-based Transiting Planets and Planetesimals Small Telescope, the exoplanet system is called TRAPPIST-1.

Which of the above statements is/are correct?

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• Time to orbit the star: 256 days
• Time of rotation on axis: 10 hours
• Axis of rotation: Perpendicular to the plane of its orbit
• Water: Strong possibility of presence of water
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1. Length of an year
2. Length of 1 day and 1 night
3. Seasons
4.Whether there is possibility of life

1. Consider the following statements,

1] The Goldilocks Zone refers to the habitable zone around a star where the temperature is just right - not too hot and not too cold - for liquid water to exist on a planet.

2] Generally, Goldilocks zones are found between two black holes.

Which of the above statements is/are correct?

Q. Consider the following statements regarding the Discovery and Colonisation of America:
1. Amerigo Vespucci discovered America in 1492.
2. Christopher Columbus was an Italian explorer.

Which of the above statements is/are correct?

3. Consider the following statements regarding “Megamaser’s”, which recently appeared in the news,

1) Megamaser’s are cousins of lasers.

2) Lasers are devices used to emit a beam of light by controlling the emission of photons from excited atoms. While ‘masers’, which are a play on the word ‘laser’, do the same in the microwave region.

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Which of the following statements is/are correct?

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