Universe MCQ Question and Answer | Geography MCQ Question

Due to the earth's rotation, stars appear to move. As the Earth rotates from west to east, the stars appear to rise in the east, moving across south to set in the west. The Sun will appear to move through the stars, making one complete circuit of the sky in 365 days.

The 'Solar Corona' mainly consists of molten lava. A corona (Latin, 'crown') is an aura of plasma that surrounds the Sun and other stars. The Sun's corona extends millions of kilometres into outer space and is most easily seen during a total solar eclipse, but it is also observable with a coronagraph.

Mars is often called the 'Red Planet' because it appears in the sky as an orange-red star. The colour caused the ancient Greeks and Romans to name it after their god of war. Today, thanks to visiting spacecraft, we know that the planet's appearance is due to rust in the Martian rocks.

Venus is sometimes called Earth's twin because Venus and Earth are almost the same size, have about the same mass (they weigh about the same), and have a very similar composition (are made of the same material). They are also neighboring planets. However, Venus and Earth are also very different. Venus has an atmosphere that is about 100 times thicker than Earth's and has surface temperatures that are extremely hot. Venus does not have life or water oceans like Earth does. Venus also rotates backwards compared to Earth and the other planets.

Twelve constellations referred to as zodiac are imaginary region that encompass the path of the planets. The 12 constellations in the zodiac family can all be seen along the ecliptic. They are: Aries, Taurus, Gemini, Cancer, Leo, Virgo, Libra, Scorpio, Sagittarius, Capricorn, Aquarius and Pisces.

It is India's first interplanetary mission and it made it the fourth space agency to reach Mars, after Roscosmos, NASA, and the European Space Agency. It is the first Asian nation to reach Mars orbit, and the first nation in the world to do so in its first attempt.

Solar eclipses on Jupiter occur when any of the natural satellites of Jupiter pass in front of the Sun as seen from the planet Jupiter. On Mars, annular solar eclipses are possible.

The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons. Hydrogen nuclei fuse to form one helium atom. During the fusion process, radiant energy is released.

The nearest star to the Sun from Earth is Proxima Centauri, which is part of the Alpha Centauri star system. Its distance is approximately 4.2 light years. A light year is the distance that light travels in one year, and it is a common unit used in astronomy to represent vast distances in space. Therefore, the correct answer is Option D, which is 4.2 light years.

While Venus is seen only for one to two hours either after sunset or before sunrise, Jupiter is seen for the whole night whenever it is visible in the sky. The reason for this is that the orbit of Venus is inside the earth's orbit whereas the orbit of Jupiter lies outside the orbit of the Earth.