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Tontin Tontin
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11 years ago
Also, what is the escape velocity to escape from the solar system (from Sun's gravity) ?
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#1
11 years ago
Escape velocity = sqrt(2*G*M/R)'G' is gravitational constant 6.673^minus 11'M' is total mass'R' is radius
smn
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#2
11 years ago
Since the earth orbits the sun at 30km/s, the escape velocity from the solar system at the earth distance is about 42 km/s. (you multiply by sqrt2) For the galaxy, that depends on the repartition of the dark matter halo. I don't know if there is a reliable caculation
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#3
11 years ago
To leave the solar system, one would need to attain a velocity of about 16.7km/s

To leave the galaxy, one would need to attain a velocity of approx. 1000km/s (however this velocity is uncertain because the exact mass of our galaxy remains unknown, and therefore we cannot make accurate calculations)
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#4
11 years ago
Escape velocity depends on how far you are from the center of gravity.
Solar system, from Earth orbit = 42.1 km/s
Galaxy, from solar system = 525 km/s  to 550 km/s (according to professors Carney and Latham).
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