tag:blogger.com,1999:blog-4709336813271377291.post1863841174850926546..comments2010-12-12T08:06:10.434-08:00Comments on STARRYBUSINESS: Weekly Reflection 3Alyssahttp://www.blogger.com/profile/08962188511223099359noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-4709336813271377291.post-41783717560552092912010-10-12T12:58:21.988-07:002010-10-12T12:58:21.988-07:00the basics around the spectra is good for now. We...the basics around the spectra is good for now. We will work with it again in a lab on the Sun's spectra. <br />Gravity: Masses in the equation are straight forward, but distance sometimes isn't. In physics, we think of masses as "point masses" meaning we measure the distance between the "center of mass" of each of the objects. So for the distance, let's say, between the Sun and Earth.... we would measure from center to center ideally. This distance changes (because of elliptical orbit), so an average distance is used. 150,000 km.RunningTeacherhttps://www.blogger.com/profile/16736968128450142147noreply@blogger.com