SpaceX launched a mystery satellite to geostationary transfer orbit (GTO) from Florida's Space Coast early Sunday morning ...

Thanks to atomic clocks (and all the worldly forces that influence them), scientists know that Earth's rotation has begun to ...

Orbital mechanics can be a bit counter-intuitive. We have to slow down an orbiting space craft to convert kinetic energy for gravitational energy. The orbital altitude is raised at its highest point ...

After spending nearly 20 days on the International Space Station, the four-member crew of the private commercial Axiom 4 mission undocked on Monday morning and they are making their commute to Earth.

An overview and hands-on test of the HYCHIKA Orbital Sander, showcasing its adjustable speeds, ergonomic design, and strong ...

But on average, Earth's orbital speed is about 19 miles per second (30 km per second). That's about 600 million miles (1 billion km) every year.

The impact will change Dimorphos’ speed by 1% as it orbits Didymos. It doesn’t sound like much, but doing so will change the moon’s orbital period.

Following the impact, NASA says, the small asteroid's, or moonlet's, orbital speed should change by a fraction of a percent, which would lead to an orbital period that's several minutes slower.

Using the UVES spectrograph on the VLT they measured their orbital speed, and noticed that their orbits change over time.

Citizen scientists spotted an object zipping through the Milky Way at more than 1 million miles an hour, and a new study shows it could be a rare hypervelocity star.