Special Relativity 2: Spacetime & Space Travel eBook

Special Relativity 2:
Spacetime &
Space Travel

Robert L. Piccioni, Ph.D.

Part of the
Everyone's Guide Series

Award winning books
Shop Now
Feynman Simplified
ebook series
Everyone's Guide
ebook series
About Dr. Piccioni
Free Videos
mailbox Newsletter Sign-Up

This is the second book in the Everyone’s Guide Series devoted to Einstein’s Theory of Special Relativity. Readers will benefit from a prior reading of Special Relativity 1: Light, Time, & What’s Relative.

Relativity and Quantum Mechanics are the two major pillars of 20th century physics, which together revolutionized our understanding of nature, utterly dismantling Newtonian physics that had been the gold standard of science for over 200 years, and introducing radically new concepts that defy human intuition. These theories may represent the greatest upheaval in the history of science. Both Relativity and Quantum Mechanics were launched over 100 years ago, yet we are still digesting their broad and stunning implications. Both theories have been exhaustively tested and confirmed to extraordinary precision. As bizarre as they may seem at first, there is no denying that they describe our world as it really is.

n this book, we will discuss: spacetime, Einstein’s unification of space and time; the Lorentz Contraction and Transform; relativistic mass and Einstein’s most famous equation E=mc2; light cones past and future; causality and simultaneity; and the impact of Relativity on space travel. Also included are helpful math tricks that simplify problem solving.


Spacetime can be thought of being like salami. In our inertial frame, the upper half of the image, each thin slice perpendicular to the long axis is a slice of constant time. We observe every event on each slice occurring at the same time — to us every event on a slice occurs simultaneously. We observe time progressing as we move from slice to slice toward the right. The two dots in the image appear to us to occur at different times.

But the situation changes in moving frames. As shown in the lower half of the image, the slices of constant time for moving observers seem askew to us. In the moving frame, the two dots occur at the same time, and events that we consider simultaneous occur at different times.

for $2.99
Click on one of the following:

Special Relativity
2: Spacetime
& Space Travel

See all the books
in the

Everyone's Guide