Which of the following celestial body contains Helium-4 in abundance?

Solution (By Examveda Team)

Helium-4 is the most common and stable isotope of helium. It is one of the most abundant elements in the universe and is found in very large quantities inside stars and gas giant planets.

Saturn is the second-largest planet in our Solar System and is known as a gas giant. Its atmosphere is made up of about 96% hydrogen and around 3% helium. Almost all of this helium is Helium-4, making Saturn extremely rich in this isotope.

Earth contains only tiny amounts of helium in its atmosphere because helium is a very light gas. Over time, it rises into the upper atmosphere and escapes into space due to Earth's relatively weaker gravity.

The Moon has almost no atmosphere. Although the solar wind deposits small amounts of helium (including Helium-4) onto the lunar surface, these quantities are very small compared to the enormous amount of helium present in Saturn. The Moon is more commonly studied for its potential reserves of Helium-3, not because it is rich in Helium-4.

Venus has a very dense atmosphere, but it is composed of about 96% carbon dioxide and about 3.5% nitrogen. Helium is present only in trace amounts and is not abundant.

Therefore, among the given options, Saturn contains Helium-4 in abundance, making Option D the correct answer.