All Read Posts

Ends of the World

Natural History Magazine

A description of the ultimate fate of the Earth, Sun, and the universe.

The Tidal Force

Natural History Magazine

A description of the tidal force and how it differs from gravity.

The Coriolis Force

Natural History Magazine

How does a spinning body affect the weather and the force felt on Earth and other planets?

Dedication of the Center for Space Education

Keynote address for the dedication of the Center for Space Education at Kennedy Space Center.

Energy

Universe Down to Earth

Chapter 6 from the book Universe Down To Earth is all about energy.

Confused Person’s Guide to Astronomical Jargon

Universe Down to Earth

Chapter 4 from the book Universe Down To Earth which describes and defines astronomical jargon.

Menagerie

Universe Down to Earth

Chapter 11 from the book Universe Down To Earth, which takes a census of the night sky and its constellations.

Celestial Windings

Universe Down to Earth

Chapter 13 from the book Universe Down To Earth about planetary motions in the Solar System.

Horrorscope

Universe Down to Earth

Chapter 12 from the book Universe Down To Earth about the validity of horoscopes.

A Sentimental Journey to the Googolplex

Universe Down to Earth

Chapter 1 from the book Universe Down To Earth about the origin of numbers and the words we use to describe them.