The image shows a diagram of the solar system. Which of the following planets is known as the 'Red Planet'?

What is the ratio of the maximum mass of the observable universe to the minimum mass of an electron?

$A$ total solar eclipse is observed from the Earth. At the same time,an observer on the Moon views the Earth. She is most likely to see ($E$ denotes the Earth):

The age of the universe is believed to be

What are inferior planets,and what is meant by the elongation of a planet?

Asteroids are