Astronomy and Celestial Phenomena

The Moon is tidally locked to Earth, meaning its rotation period exactly matches its orbital period (about 27.3 days). This synchronization causes the same side to always face Earth. If the Moon didn't rotate or if only one side reflected light, we wouldn't consistently see only one face.

A satellite is any object that revolves around another object in space. The moon orbits the earth, which makes it the earth's natural satellite. Option A incorrectly focuses on size rather than orbital relationship.

Spring tides occur when the sun, moon, and earth align in a straight line (syzygy), which happens during new moon and full moon phases. This alignment combines gravitational forces, creating higher high tides and lower low tides. Option C describes neap tides, not spring tides.

When comets approach the Sun, solar radiation causes their frozen ices to sublimate (change directly from solid to gas). This creates a glowing coma and two tails - a dust tail and an ion tail - that always point away from the Sun. The 'fire' distractor is wrong because space lacks oxygen for combustion.

Light travels at approximately 299,792 km/s. The average Earth-Sun distance is about 150 million km. Dividing gives about 500 seconds, or roughly 8 minutes and 20 seconds. This means we always see the Sun as it was 8 minutes ago - if it suddenly disappeared, we wouldn't know for 8 minutes.

According to the biblical creation account in Genesis, God created the sun, moon, and stars on the fourth day to separate day from night and mark seasons, days, and years.

Light travels at 299,792 km/s, and the average Earth-Sun distance is about 149.6 million km, giving a travel time of approximately 8 minutes and 20 seconds (8.33 minutes).

The Sun loses approximately 1.3 to 1.9 million tons (1.3-1.9 billion kilograms) of mass every second due to solar wind and nuclear fusion converting mass to energy. This continuous mass loss is a fundamental process in stellar evolution.

Earth's high albedo (reflectivity) comes from its extensive water bodies, ice caps, and clouds which reflect sunlight. However, the question contains an error - Venus is actually the brightest planet in our solar system as seen from space due to its thick cloud cover.

The sun's light takes approximately 8.3 minutes to reach Earth. If traveling at light speed, you would continuously see the sun's light as it overtakes you. However, the question refers to how long the sun would remain visible as a distinct object, which is approximately 30 years based on the sun's angular size and the physics of light.

The moon illusion is a psychological phenomenon where the moon appears larger near the horizon. This occurs because the brain compares the moon's size to foreground objects like trees and buildings when it's low, making it seem larger. When the moon is high overhead, there are no reference objects, so it appears smaller despite being the same angular size.

Prakash (Sanskrit: प्रकाश) means 'light, brightness, illumination'. It comes from the root 'prakash' meaning 'to shine forth'. Option A is the correct literal meaning.

Starlight from distant stars is affected by both Earth's atmosphere (atmospheric scattering and absorption) and interstellar dust (scattering and extinction in space). The atmosphere causes twinkling (scintillation) and absorbs certain wavelengths, while interstellar dust causes extinction and reddening of starlight. Both effects must be accounted for in astronomical observations. Only one of these factors would be incomplete.

The tropical year (time between successive spring equinoxes) is slowly decreasing due to both gradual changes in Earth's rotational speed and small changes in Earth's orbit around the Sun. Earth's rotation is very gradually slowing due to tidal friction from the Moon, and orbital parameters undergo cyclical variations (Milankovitch cycles) including changes in eccentricity, axial tilt, and precession. These combined effects cause the measured tropical year length to decrease very slightly over long timescales.

Aditya is a Sanskrit name for the Sun. In Hindu mythology, the Adityas are solar deities. The other options (Earth, Rays, Moon) have different Sanskrit equivalents like Prithvi, Kirana, and Chandra.