Space and astronomy news
This artist’s impression illustrates an interstellar object rapidly approaching our Solar System. The object, ejected from its home planetary system long ago, traveled through interstellar space for billions of years before briefly passing through our cosmic neighborhood. Rubin Observatory will reveal many of these previously unknown interstellar visitors. Alt-Text: An artist’s impression of a small, rocky interstellar object hurtling from the upper right toward the inner Solar System.
The evolution of the orbits of the planets is a complex process. Initially the planets formed out of a rotating disk of gas and dust around the young hot Sun. The phenomenon of the conservation of angular momentum caused the material to form a plane leading to orbits that were circular and in the same plane.
As the planets grew, interactions within the protoplanetary disk led to orbital migrations with planets moving inwards or outwards. There were gravitational interactions too that led to significant changes in the eccentricity and inclination, sometimes causing protoplanets to be ejected out of the solar system. Tidal forces from the Sun could also have altered the orbits.
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