Hubble Law Lab Questions
7 I Turn these in at the end of lab.
Material in this lab has been adapted 'om a CAB draft of new Lecture Tutorials for Astronomy, 2010
1. The current best-t value for the Hubble constant is 73 (km/sec)/Mpc.
a) What value d
Lets consider the planets orbiting the Sun they actually travel in ellipses, but at this
point it is useful to approximate the orbits as circular. As you did for the ants, write a
formula for the speed of a planet around the Sun. Use the
The at rotation curves observed for stars and gas clouds of spiral galaxies also present a
problem with the gracefully curving spiral arms we observe. Well examine this problem
rst qualitatively using rotation curves then more quantitative
Galactic Rotatiorl Curves
Now you will apply these ideas of rotation curves and enclosed mass to an example spiral
galaxy that is similar to our own Milky Way.
consider the color image of the galaxy NGC 3198. As far as you can tell from this
image, how do
Astronomy 135 '
No astronomical object can stand still gravity makes certain of this. Newtons Law of
Universal Gravitation tells us that any two bodies attract each other by their mutual gravitational
force. Every object in the Univers