Questions

The fact that the planets move around the Sun, not in circles but in ellipses, was first demonstrated by

Netscape Navigator is a _____.

Which train was recently named as the 'Vande Bharat Express' by the Railways Ministry?

In the following question, out of the four alternatives, select the alternative which best expresses the meaning of the idiom/phrase.

backseat driver

Project Human Resource Management - Processes

Describe the Inputs, Tools and Techniques , Outputs included in the Acquire Project Team?

Which year was declared as the National Mathematical Year as a tribute to Mathematician Srinivasa Ramanujan?

Speeding is a factor in _% of all fatal accidents?

A passage is given with 5 questions following it. Read the passage carefully and choose the best answer to each question out of the four alternatives.

The quest to find life outside the solar system got a big boost with the discovery of seven Earth-size extra-solar planets, or exoplanets, orbiting a dwarf star about 40 light years away. Unlike earlier discoveries of exoplanets, all seven planets could possibly have liquid water — a key to life as we know it on Earth — with three planets having the greatest chance. This is by far the largest collection of Earth-like planets in the habitable 'Goldilocks' zone of a star — neither too close nor too far from a star, which raises the possibility of liquid water being present on the surface. Only Earth has liquid water in the solar system. Since the dwarf star is much cooler than the Sun, the dimming of light each time a planet passes or transits before the star could be easily recorded from Earth unlike in cases when planets transit a Sun-like bright star. Since the initial discovery of three planets was made using the Chile-based Transiting Planets and Planetesimals Small Telescope, the exoplanet system is called TRAPPIST-1.

What is essential to have the possibility of life on a planet?