Formation and evolution of the Solar System its current size. At the tip of the red giant branch, as a result of the vastly increased surface area, the Sun's surface will be much cooler (about 2600 K) than now and its luminosity much higher—up to 2,700 current solar luminosities. For part of its red giant life, the Sun will have a strong stellar wind that will carry away around 33% of its mass. During these times, it is possible that Saturn's moon Titan could achieve surface temperatures necessary to support life. As the Sun expands, it will swallow the planets Mercury and Venus. Earth's fate is less
Stranger from Venus field. This disruption would then affect the orbits and gravitational fields of all the other planets in the solar system. The stranger makes a promise that if Earth eliminates these dangers, Venus will share some of its higher scientific knowledge with our scientists. During the meeting, however, the man from Venus concludes that humanity is not yet ready to receive such advanced knowledge. After his communication disc is stolen, which allows him to contact the approaching Venusian ship, the stranger quickly realizes that an interplanetary meeting of minds can never take place. He also learns that such a meeting will