Hubble peers at cosmic blue bauble

Globular clusters are inherently beautiful objects, but the subject of this NASA/ESA Hubble Space Telescope image, Messier 3, is commonly acknowledged to be one of the most beautiful of them all.

How flying cars could help in the fight against climate change

Have you ever been stuck in traffic and wished you could zoom above the gridlock in a flying car? A new study predicts these futuristic vehicles could be good for your commute and good for the environment—as long as they're ...

More than a strip of paint needed to keep cyclists safe

Research published in the journal Accident Analysis and Prevention today shows that marked on-road bicycle lanes and parked cars reduce the distance that motorists provide when passing cyclists.

New technique for in-cell distance determination

In a joint paper, researchers from the University of Konstanz, Bielefeld University and ETH Zurich demonstrate for the first time that the electron paramagnetic resonance (EPR) technique RIDME (relaxation-induced dipolar ...

App aims to make ride sharing easier

College students looking to share a ride for a weekend getaway, a trip home or a spring break vacation now have a new option from a Purdue University-affiliated startup.

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Distance

Distance (or farness) is a numerical description of how far apart objects are. In physics or everyday discussion, distance may refer to a physical length, or an estimation based on other criteria (e.g. "two counties over"). In mathematics, a distance function or metric is a generalization of the concept of physical distance. A metric is a function that behaves according to a specific set of rules, and provides a concrete way of describing what it means for elements of some space to be "close to" or "far away from" each other.

In most cases, "distance from A to B" is interchangeable with "distance between B and A".

This text uses material from Wikipedia, licensed under CC BY-SA