Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

If Earth suddenly stopped revolving, roughly how long until it'd fall into the Sun

  1. Sep 9, 2011 #1
    Roughly how long would it take, ending the time when Earth touches the Sun's Chromosphere layer. (Ignoring interfering with other planets' gravities as it moves toward the Sun, if that situation exists.)
     
    Last edited: Sep 9, 2011
  2. jcsd
  3. Sep 9, 2011 #2

    Janus

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Re: If Earth suddenly stopped revolving, roughly how long until it'd fall into the Su

    If you mean if the Earth was to suddenly stop in its orbit, then then between ~63-66 days, depending upon what point in it orbit it was when it started the fall.
     
  4. Sep 9, 2011 #3
    Re: If Earth suddenly stopped revolving, roughly how long until it'd fall into the Su

    Wow that's fast! So with 66 days of motion, using the AU as the distance, Earth's moving at about 1.4 million miles per day.
     
  5. Sep 9, 2011 #4

    Janus

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Re: If Earth suddenly stopped revolving, roughly how long until it'd fall into the Su

    That's the average over the entire fall. It would actually move much less during the first day and be moving a lot faster on the last day. At impact, it would be moving at 618 km/sec ( the equivalent of 33 million miles per day)

    This shouldn't be too surprising, as the Earth, at its present orbital velocity, travels 1.6 million miles per day.
     
  6. Sep 9, 2011 #5
    Re: If Earth suddenly stopped revolving, roughly how long until it'd fall into the Su

    I guess the acceleration time would be drastic. Also, looking at Earth's orbit, I never realized the present velocity was that fast, but that makes a lot of sense for how far it travels in a year.
     
  7. Sep 10, 2011 #6

    Drakkith

    User Avatar

    Staff: Mentor

    Re: If Earth suddenly stopped revolving, roughly how long until it'd fall into the Su

    The solar system travels around the galaxy at a speed of 220 kilometers per second! That's 19 million km per day!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: If Earth suddenly stopped revolving, roughly how long until it'd fall into the Sun
Loading...