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Let a star be much brighter than our sun but its mass is same as that of sun If our earth has average lift span of man as `70 years` In the earth like planet of this star system having double the distance from our star find the average lift span of a man on this planet in terms of our year
.

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The correct Answer is:
`25 Years`
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Knowledge Check

  • Average distance of the earth from the sun is L_(1) . If one year of the earth =D days, one year of another planet whose average distance from the sun is L_(2) will be

    A
    `D((L_(2))/(L_(1)))^(1//2)` days
    B
    `D((L_(2))/(L_(1)))^(3//2)` days
    C
    `D((L_(2))/(L_(1)))^(2//3)` days
    D
    `D((L_(2))/(L_(1)))` days

  • Average distance of the earth from the sun is L_(1) . If one year of the earth=D days, one year of another planet whose average distance from the sun is L_(2) will be

    A
    `D((L_(2))/(L_(1)))^(1//2)`days
    B
    `D((L_(2))/(L_(1)))^(3//2)`days
    C
    `D((L_(2))/(L_(1)))^(2//3)`days
    D
    `D((L_(2))/(L_(1)))`days

  • Read the passage carefully and select the best answer to each question out of the given 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. How many planets in our solar system have liquid water?

    A
    Two
    B
    Three
    C
    One
    D
    Four
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