Searching for Earth 2.0

for Earth 2.0

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
Teacher of the Year
Free Videos
mailbox Newsletter Sign-Up

From the 16th century onward, scientists began to understand that the stars in the heavens are suns much like our own. They started to wonder whether those other suns had their own planets. And if so, they wondered, could any of those planets be like Earth.

Profound questions, but how could we answer them? Stars are typically a million times brighter than the planets that huddle near them. This means a star’s light swamps the feeble glow of any nearby planet. It seemed the search for exoplanets, planets beyond our own Solar System, would be like trying to spot a firefly next to a searchlight that’s 3000 miles away.

It seemed hopeless. But never underestimate human ingenuity.

This book describes the methods used to find exoplanets and how astronomers have succeeded in finding nearly a thousand new worlds.  

The Wobble Method

Astronomers first discovered exoplanets orbiting a normal star using the wobble method, which is also called the radial velocity method.
This method relies on the small motions of host stars caused by exoplanets that orbit them. As surprising as it may seem at first, stars do move slightly in response to the gravitational tug of their planets, even though the stars may be a million times more massive.

for $2.99
Click on one
of the following:

Searching For
Earth 2.0

See all the books
in the
Everyone's Guide