Semi-major axis is the sum of the periapsis and apoapsis distances divided by two. For classic two-body orbits, the semi-major axis is the distance between the centers of the bodies, not the distance ...

UPDATE: We need to track the semi-major axis increasing for the evidence that the satellite is increasing its orbit and the thrusters are working. The orbits seemed different to me looking at the ...

"[Our drivers'] feedback underscores the enormous potential of the Tesla Semi." Tesla announces major milestone on quest to deliver next-gen semi-truck: 'Estimated fuel savings of up to $150,000 ...

These are small rocky objects whose orbits are well beyond that of Neptune’s and have a semi-major axis (average orbital distance) of 150-250 AU (Astronomical Units, with 1 AU equaling ...

Most scientists agree that a major collision 4.5 billion years ago with a protoplanet named Theia formed the Earth-Moon system. Now, a new study from the University of Nevada argues that, out of ...

A 24-year-old Lemont woman died in a major crash involving a semi in Mundelein early Tuesday morning, police said. The crash happened at about 1:05 a.m. on U.S. 45 between Dunbar Road And Route ...