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4

Along with the other answers, which differ, about the loudness of the Sun there is information available about what it actually sounds like. I would describe it as as varying humming with static. Listen to the raw audio in this NASA video: "NASA | Sun Sonification (raw audio)", a narrated version by NASA Goddard: "Sounds of the Sun", or visit Goddard Media ...


2

The Earth orbits the Sun in a counter-clockwise direction. Covering $2 \pi \times 150\times 10^6$ million kilometers in $365.25 \times 24 \times 3600$ seconds, or 29.9 km/sec. If you wanted to leave the Earth in a clockwise heliocentric orbit you'd have to accelerate Dawn by an extra 60 km/sec to do that, which is unfeasible with current rockets. Likewise ...


5

Dawn was not exploring L3. But instead it explored both Vesta and Ceres. In order to do so in a cost-saving manner, Dawn was also a mission demonstrator for an interplanetary mission equipped with ion propulsion. Because of the low specific impulse of ion propulsion, Dawn cannot fly in a straight line, as this would imply a high initial velocity and the ...


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