The slingshot around red giant Arcturus must be only a small course correction, because diving through the giant's photosphere, at 50% light speed, would be catastrophic. A red giant has a huge envelope of glowing hot gas around it, far past the gravity field necessary for a large angle slingshot maneuver. When Earth's sun goes red giant, the photosphere will extend to Earth's orbit.
Scritto da il 05/03/2025 alle ore 07:52

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