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Exoplanet smashup: The very weird dust disk around BD +20 307

13 Feb 2020, 14:00 UTC
Exoplanet smashup: The very weird dust disk around BD +20 307 NASA / SOFIA / Lynette Cook

The placements of the planets in our solar system are pretty stable. By that I mean their orbits don't change much over time. There are changes, to be sure, but they tend to be slow or cyclic, and any big changes would take millions, if not billions, of years to play out.

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