Simulation suggests up to 24 Earth-mass worlds could share an orbit, just like two of Saturn's moons. Finding such an arrangement could point to advanced aliens.

The newfound asteroid 2023 FW13 circles the sun in sync with Earth, making it our planet's "quasi-moon." The space rock is in an orbit so elaborate that "it sweeps out halfway to Mars and in ...

Using the Systems Tool Kit simulation software, the authors examined various LNCSS constellation case studies based in elliptical lunar frozen orbit and with a low-grade chip-scale atomic clock. They ...