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Welcome to Einstein Online - relativity and more!

This web portal provides information about Albert Einstein's theories of relativity and their coolest applications, from the smallest particles to black holes and cosmology.

Elementary Einstein

Just starting with relativity? Then it's time to read our online introduction, Elementary Einstein!

Einstein - Original version

Ready to read about Einstein's theories in his mother tongue? Then try the German version of Einstein Online!

Schwarzschild, LISA & Co.

Ready for more Einstein? Our Spotlights on relativity deal with selected topics in relativity - from modern research to age-old questions. Our latest additions:

Schwarzschild, LISA & Co.

eLISA - Hunting waves in space

eLISA - Hunting waves in space

Information about the latest version of the most ambitious gravitational wave project - a detector in space

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White Dwarf binaries as gravitational wave sources

White Dwarf binaries as gravitational wave sources

White Dwarf binaries, their properties, and the role they will play for the planned space-borne gravitational wave detector LISA

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Varying Newton’s constant: A personal history of scalar-tensor theories

Varying Newton’s constant: A personal history of scalar-tensor theories

Information about a modification of Einstein's theory of general relativity in which the gravitational constant is not a constant.

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Links & Books

Our recommendations for books and websites on relativity and its history.

About Einstein Online

Includes information on our authors and partners, and the section What's New?

Partner Website

The following website give you a different perspective on relativity. Help the researchers look for gravitational waves!

Einstein at Home

Einstein@Home

Help us search for gravitational waves with Einstein@Home! Visit this website to see how you and your home computer can take part in cutting-edge research.

Dictionary

More than 350 entries from "absolute zero" to "X-rays" - whenever you see this type of link on an Einstein Online page, it'll take you to an entry in our relativistic dictionary.

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