Determine the linear dimensions of the galaxy if it is moving away from us at a speed of 6000 km / s and has an apparent angular size of 2 ‘

The linear diameter of the galaxy is D = r * d “/ 206265”, where r = V / H.
H = 70 km / (s * Mpc)
r = 6000/70 = 85.7 Mpc, where r is the distance to the galaxy
D = 85.7 * 2 ′ / 206265 “= 0.0008309 Mpc ≈831pc

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