Philip Hogan

How a Telescope Works: The Science of Light and Lenses

What Is Focal Ratio and How Does It Affect Imaging?

What Is an Absorption Spectrum and How Does It Work?

What Are the Variables That Affect the Force of Gravity?

Why Is the Image in My Telescope Upside Down?

What Is Natural Radioactivity and Where Does It Come From?

How Does Gravity Relate to the Distance Between Two Objects?

What Would Happen If a Needle Hit Earth at the Speed of Light?

What Is the Acceleration Limit Before Blacking Out?

What Is the Relationship Between Mass and Gravity?

What Factors Affect the Force of Gravity?

What Is Kepler’s 2nd Law of Planetary Motion?

How Can the Weight of an Object Change While the Mass Stays the Same?

Where Do Bullets Go When Shot in the Air?

What If a Black Hole and a White Hole Collide?

Why a Sonic Boom Happens and How It’s Created

How Does the Sextant Work in Celestial Navigation?

What Is an Emission Spectrum and How Is It Used?

What Happens When You Put a Grape in the Microwave?

What Is Hydrostatic Equilibrium and How Does It Work?