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How massive must a colliding body be to disturb Earth's orbit? | Astronomy.com

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How massive must a colliding body be to disturb Earth's orbit?

FROM THE February 2013 ISSUE

How massive must a colliding body be to disturb Earth's orbit?

Burkhard Klesser, Teufenthal, Switzerland

Published: Friday, December 21, 2012

First, letт??s talk about what it means to т??disturbт?? Earthт??s orbit. Every object that hits Earth changes its orbit a little. Maybe youт??re really interested in impacts that would change the planetт??s orbit enough that
it would affect our everyday life т?? for example, by causing the year to be one day longer or shorter, or by causing winter to be noticeably warmer.

Astronomy magazine subscribers can read the full answer for free. Just make sure you're registered with the website.