When we’re told about newly released satellite images of our Earth, we imagine beautiful swathes of green and blue with the occasional white of swirling storm clouds or snow-topped mountain ranges.

No audio available for this content. On Aug. 10, the National Geodetic Survey (NGS) released its latest experimental geoid model, xGeoid18. In early 2019, NGS is scheduled to release its next hybrid ...

No audio available for this content. This column discusses the results of the National Geodetic Survey (NGS) beta hybrid Geoid18 model and the differences between the beta model and the official ...

AMAZING GRACE Data collected by the twin Gravity Recovery and Climate Experiment (Grace) satellites have produced the most accurate map yet of Earth's geoid, or gravity field, even before the ...

A sophisticated satellite of the European Space Agency (ESA) has mapped Earth's gravity with unprecedented precision, helping scientists have clearer understanding of the variation in the ...

For decades, textbooks and science articles have pointed to the Indian Ocean as home to Earth’s deepest geoid low, the term scientists use for depressions in the planet’s gravity field. Pull up a ...

Lumpy planet Scientists have unveiled the most accurate map of the Earth's gravity ever produced, which shows it to be shaped not like a sphere but a potato. The new data is expected to improve our ...

The Earth’s geoid is the shape the planet would assume if its surface were made of water. Naturally, there’s little dispute over the shape of the geoid over the oceans, where it varies by only 100 ...

What shape is planet Earth? It's a sphere, right? Well not exactly. OK, so it's a bit flatter at the poles and bulges in the middle. An oblate spheroid? That's a better approximation, but still not ...

It is one of the most exquisite views we have ever had of the Earth. This colourful new map traces the subtle but all pervasive influence the pull of gravity has across the globe. Known as a geoid, it ...