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Astronomy

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Stellar Classification

easy
Astronomy

What is the current stage of the star 'Sun'?

A
white dwarf
B
red giant
C
yellow dwarf
D
orange dwarf
Explanation and memory cue

The Sun is currently in the main sequence phase of its life cycle, classified as a yellow dwarf star (spectral type G2V). It is neither a white dwarf, red giant, nor orange dwarf at this stage.

82

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Planets

easy
Astronomy

Which planet is the brightest in our solar system?

A
Earth
B
Venus
C
Mercury
D
Jupiter
Explanation and memory cue

Venus is the brightest planet in our solar system as seen from Earth due to its thick, reflective cloud cover and its proximity to the Sun and Earth, making it more luminous than other planets.

83

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Planetary Science

easy2021FIA ASI Paper 15-12-2021
AstronomyFIA

Which planet is known for its beautiful rings?

A
Jupiter
B
Saturn
C
Uranus
D
None of these
Explanation and memory cue

Saturn is famously known for its prominent and beautiful ring system, which is the most extensive and visible among the planets in our solar system. Jupiter and Uranus also have rings, but they are faint and less noticeable.

84

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Sunspots discovery

easy2021FIA Assistant Paper 15-12-2021
AstronomyFIA

Who discovered sunspots?

A
Galileo
B
Chadwick
C
Newton
D
None of these
Explanation and memory cue

Sunspots were first observed and documented by Galileo Galilei in the early 17th century using a telescope, making him credited with their discovery.

85

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Satellites

easy2021FIA Assistant Paper 13-12-2021
AstronomyFIA

What was the first satellite in the world?

A
Sputnik 1
B
Sputnik 2
C
Sputnik 3
D
None of these
Explanation and memory cue

Sputnik 1, launched by the Soviet Union on October 4, 1957, was the first artificial satellite to orbit the Earth, marking the beginning of the space age.

86

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Units in space

easy2020
AstronomyFIA

A light year is a unit of:

A
Light
B
Energy
C
Gas
D
Distance
Explanation and memory cue

A light year is the distance that light travels in one year through a vacuum, making it a unit of distance, not light, energy, or gas.

87

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Planets

easy2019FIA Assistant Director Legal & Investigation Paper 2019
AstronomyFIA

What is the dark spot on the planet?

A
A huge spinning storm
B
A huge mass
C
A small mass
D
None of these
Explanation and memory cue

The dark spot on a planet, such as the Great Red Spot on Jupiter, is a huge spinning storm or a giant storm system. This is a well-known feature observed on gas giant planets.

88

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Planets

easy2019FIA Assistant Director Legal & Investigation Paper 2019
AstronomyFIA

Which planet has the dark spots?

A
Saturn
B
Jupiter
C
Mercury
D
None of these
Explanation and memory cue

Jupiter is known for its Great Red Spot, a giant storm visible as a dark spot on the planet. This distinguishes it from Saturn and Mercury, which do not have such prominent dark spots.

89

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Planets

easy2019FIA Assistant Director Legal & Investigation Paper 2019
AstronomyFIA

Which planet protects Earth from comets?

A
Venus
B
Jupiter
C
Saturn
D
Mercury
Explanation and memory cue

Jupiter's strong gravitational field acts as a shield by attracting or deflecting comets and asteroids that might otherwise collide with Earth, thereby protecting our planet.

90

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Planets

easy2019FIA Assistant Director Legal & Investigation Paper 2019
AstronomyFIA

How many planets are easily visible from the Earth?

A
Five Planets
B
Six Planets
C
Seven Planets
D
None of these
Explanation and memory cue

Five planets—Mercury, Venus, Mars, Jupiter, and Saturn—are easily visible to the naked eye from Earth without the aid of telescopes. This is a well-established fact in astronomy.