Let’s imagine that you sent a ship towards the Sun, and at a distance of 20...

Let’s imagine that you sent a ship towards the Sun, and at a distance of 20 million km (2x10^10 m), which is halfway between the Sun and Mercury, you suddenly opened the reflective solar sail and thrusted towards Pluto. Estimate the velocity of the spacecraft as it reaches back the Earth on its way towards Pluto. Assume that the initial velocity was 0 (when sail was deployed close to the Sun). The distance from the Sun to the Earth is 150 million km, and the Sun’s power is 3.8x10^26 W. Assume the reflective sail is 200 x 200 m^2 and mass of the spacecraft is 100 kg.
Have in mind that the light intensity reaching the sail decreases as the spacecraft moves further from the Sun. Include this fact in your estimate.

Expert Solution

genius_generous answered 2 years ago

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