Richard De Grijs Books

Time and Time Again

By Richard De Grijs

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Astronomical Distance Determination in the Space Age

By Maurizio Falanga, Richard De Grijs

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An introduction to distance measurement in astronomy

By Richard De Grijs

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An introduction to distance measurement in astronomy

By Richard De Grijs

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Star clusters

By International Astronomical Union. Symposium

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"Star clusters are important to many areas of astronomy, and as the basic building blocks of galaxies, they can be used as key diagnostic tools within a wide range of disciplines in astrophysics. S...

At the Cross Roads of Astrophysics and Cosmology

By Marcio Catelan, Patricia A. Whitelock, Richard De Grijs

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Advancing the Physics of Cosmic Distances IAU S289

By Giuseppe Bono, Richard De Grijs

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Knowing the distance of an astrophysical object is key to understanding it. However, at present, comparisons of theory and observations are hampered by precision (or lack thereof) in distance measu...

Introduction to Distance Measurement in Astronomy

By Richard De Grijs

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Introduction to Distance Measurement in Astronomy

By Richard De Grijs

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.