Five-planet Nice model distant massive ninth planet is responsible for the alignment of the perihelia of several trans-Neptunian objects with semi-major axes greater than 250 AU. Although the mechanism for the ejection of the fifth giant planet in the five-planet Nice model is reminiscent of the origin of Planet Nine, with a gravitational instability including an encounter with Jupiter, it is unlikely to be the same planet. The estimated timing of the capture of Planet Nine onto its distant orbit, three to ten million years after the formation of the Solar System, when the Sun was still in its birth cluster, is inconsistent
Tales from the Planet Sylvia Tales from the Planet Sylvia Tales from the Planet Sylvia is a 1990 collection of comic strips by the American cartoonist Nicole Hollander from her syndicated comic strip "Sylvia". The strips are non-continuous with one another, as is usual for "Sylvia", and they feature the standard content of "Sylvia" comics, such as cats, gender politics, and the afterlife. The strips display a pungent sense of humor and a strong touch of feminism, as the title character interacts with her friends, her daughter, and her television set. Published in 1990 by St. Martin's Press, the book has an introduction by Barbara