With winter drawing in and weather getting cold and wet, staying active and keeping fit is harder than ever – especially if you’re unable or unwilling to get to the gym. While at-home equipment can ...

Abstract: This article proposes a geometric-based method of the ground-point visibility from a satellite or satellite constellation in elliptical orbit considering the J 2 perturbation. First, the ...

Abstract: This article investigates a fixed-time simultaneous arrival (FTSA) problem in terms of the equilibrium of path lengths of unmanned vehicles. A novel trajectory elliptical homotopy method ...

The inner region is smooth and devoid of gas, characteristics typical of elliptical galaxies. There, star formation has essentially ceased, leaving behind an ageing population of stars. Astronomers ...

(WLOS) — Tonight marks the beginning of a stretch of back-to-back supermoons that continues into next year. A supermoon is a full moon that occurs at perigee, the location in its elliptical orbit that ...

Tonight (Oct. 6) the first supermoon of 2025 will rise big and bright into the autumn sky. Dubbed the Harvest Moon — one of the most famous full moons of the year — it is the first full moon of autumn ...

Four back-to-back Supermoons will grace the night sky to end the year and start 2026, beginning with the Harvest full Moon this week. The Moon will be at its fullest just before midnight on Tuesday, ...

To better understand the penetration mechanism of the elliptical cross-section projectile (ECSP) into semi-infinite concrete target, penetration experiments using three types of ECSPs with different ...