Science, Space and Technology News 2024
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. Credit:Vera C.
With the aid of observations of our Solar System and computer simulations, scientists speculate that the gravity of larger planets and passing nearby stars often launches most of these remnant planetesimals away from their home systems and out into their galaxies. Traveling through space and not bound to any star, they’re now known as interstellar objects.
If planets are the correspondents, interstellar objects are the telegrams containing valuable information about distant planetary systems and how they formed. And for a short time, some of these messages from afar are right in our cosmic backyard. “A rock from another solar system is a direct probe of how planetesimal formation took place at another star,” said Bannister, “so to actually have them come to us is pretty neat.
Rubin Observatory will change that. Using an 8.4-meter telescope equipped with the highest-resolution digital camera in the world, Rubin will detect fainter interstellar objects than we’ve ever seen before. “It’s as though you suddenly go from being on a little boat bobbing around in the beautiful shallows just off the shore, to now you’re out over the big deep ocean and you can see into all that expanse for the first time,” said Bannister.
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