Naked Science Forum

Non Life Sciences => Physics, Astronomy & Cosmology => Topic started by: Dharmansh on 11/11/2011 15:04:40

Title: do we really revolve around the sun, around the galaxy , through the universe?
Post by: Dharmansh on 11/11/2011 15:04:40

Is it true that we revolve around the sun and full solar system revolve around the Galactic center and Galaxy travel from one place to another as Universe is expanding?

modified to make subject into a question Matthew

Title: do we really revolve around the sun, around the galaxy , through the universe?
Post by: Soul Surfer on 12/11/2011 23:32:33

Yes, the first two are easy the last is our velocity with respect to the cosmic microwave background.  This gives an absolute velocity reference that can be measured everywhere in the universe.

The velocities are  earth round sun 30km/s   
                                 sun and solar system round galaxy 220km/sec
                                 galaxy through space with respect to CMB  368Km/sec

This latter velocity is reasonably typical of the velocities of galaxies generally with respect to the background radiation

Title: do we really revolve around the sun, around the galaxy , through the universe?
Post by: Dharmansh on 13/11/2011 05:22:35

Thanks...So is there any specific point in the galaxy where the life begin on earth and will be there any specific point where Earth will end?

Title: do we really revolve around the sun, around the galaxy , through the universe?
Post by: imatfaal on 13/11/2011 09:58:34

There might possibly be a point - but as we have no real conception of when life really "began" we would never be able to pinpoint it.  Similarly when will earth end? - when all life is extinguished?  when it falls into the sun?  when its last remnants are lost to heat death?

Your questions above are not really the sort that are addressed by science and seem that they might have a spiritual/mystical motivation behind them