A 250-day experiment using a ring laser achieved unprecedented accuracy in measuring Earth's axial wobble (nutation and precession), surpassing previous gyroscope and ring laser technologies by a ...
Amazon S3 on MSN
Discover the deepest point on Earth and how we measure it
Scientists discover a lemon-shaped planet with something they've never seen before ...
We know Earth’s rotation on a cosmic scale, but seeing it close up requires quantum mechanics. Interferometry is the use of light waves, sound, etc., to identify changes in matter or motion. New ...
The measurement technique of the aspheric surface is mainly for the surface form and parameters. The surface form is the three-dimensional distribution of the surface in the spatial domain. The ...
Google Earth allows you to measure the distance between two points on the Earth, as well as the circumference of a circular section of the ground — or even the elevation of a mountain. But in order to ...
The Nature Network on MSN
How astronomers measure distance without travelling anywhere
It’s a bit mind-bending to realise that everything we know about the scale of the universe comes from people stuck […] ...
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