Travis Lund

How Might Mars Be Different Without So Much Iron?

What Evidence Shows That Sunspots Are Magnetic?

What Protects Us From the Radiation of the Sun’s Solar Wind?

Does the Sun Emit Gamma Rays?

What Is Solar Time and How Is It Measured?

How Hot Is a White Dwarf? From Formation to Cooling

What Factors Affect the Color of a Star?

Why Can We See Some Stars for Only a Portion of the Year?

What Elements Make Up Stars and How Do We Know?

Why Is the Moon Getting Further Away?

What Is a Planetesimal? The Building Blocks of Planets

What Event Brings the Forming Star Into Energy Balance?

What Is the Plane of the Ecliptic?

Where Does the Heat Inside New Planets Come From?

What Is a Solar Day and Why Is It 24 Hours?

Do Stars Blink in the Sky? The Science of Twinkling

Why Were Ancient Peoples Unable to Detect Stellar Parallax?

Can All the Planets Align in a Straight Line?

Why Do Some Stars Flicker Red and Blue?

Is There a Purple Planet? The Science of Planetary Color