if a galaxy has a radical velocity of 2000 km/s and the hubble constant is 70...

xjessicax · #1 (**permalink**) 04-29-2008, 07:15 AM

...km/s/Mpc, how far away..? is the galaxy?

Brant · #2 (**permalink**) 04-29-2008, 07:15 AM

It's velocity would be 70 km/sec if it was one Mpc away. So 2000 divided by 70 is 28.57. That's how many Mpc it is.

(It's "radial," not "radical.")

peruvianprincess6 · #3 (**permalink**) 04-29-2008, 07:17 AM

D= V/Hconstant

so
2000/70=28.5 Mpc

are you in astro 100? if so did you get #4?

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