Question

Which planet is also known as the Red planet ?
A. Mars
B. Mercury
C. Venus
D. Jupiter

Answer 1

A planet is an astronomical organ orbiting a star or stellar remain which is massive enough to be circled by its own gravity. It is not massive enough to produce thermonuclear fusion and has cleared its neighbouring region of planetesimals according to the International Astronomical Union but not all planetary scientists.

Complete answer:
Mars is the Sun's fourth largest planet, and the Solar System's second-smallest planet, bigger than Mercury. In English, Mars is known as the 'Red Planet' by the name of the Roman War God. The latter relates to the effect on Mars' surface of the iron oxide, which provides a reddish hue which is unusual among the naked visible astronomical bodies.

Mars is a thin atmosphere planet with surface characteristics similar to Earth's impact craters and valleys, desert areas and polar ice caps. The days and seasons are identical to Earth's because the rotary and the inclination of the rotary axes are identical to the ecliptic plane.

Mars is the site of the Olympus Mons and Valles Marineris, one of the greatest volcanoes and the world's tallest known mountains, in the solar system. In the Northern Hemisphere, the smooth Borealis Basin is 40% of the earth and may have a major influence. Mars has two little, oddly shaped lunars, Phobos and Deimos. These asteroids, like 5261 Eureka, a trojan of Mars may be caught.

Hence option A is correct.

Note: Mars, with its reddish tint, may easily be seen from Earth with the naked eye. Its apparent magnitude only extends across Venus, Moon and the Sun −2.94. Optical ground-based telescopes are usually restricted to the resolution of the Earth's atmosphere at around 300 kilometres (190 mi) in length.