Ask a Spaceman!

How do we measure the age of the universe? Why are different methods giving different results? How do we solve this problem? I discuss these questions and more in today’s Ask a Spaceman!

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What is a black hole firewall? How does it solve some paradoxes when it comes to black holes? Do the firewalls actually exist? I discuss these questions and more in today’s Ask a Spaceman!

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What killed Mars billions of years ago? How can we kickstart a warming trend to transform Mars to look like Earth? What kind of technology do we need, and how well will it work? I discuss these quest…

What makes quantum computers so powerful? What kinds of problems can they solve? How do we actually build one? I discuss these questions and more in today’s Ask a Spaceman!

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How did we discover neutrinos? What don’t they make any sense? Why do they have mass, and how do they change their identities? I discuss these questions and more in today’s Ask a Spaceman!

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Is our universe a fractal? How do we test this? Are there any places in the universe that look like fractals? I discuss these questions and more in today’s Ask a Spaceman!

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What is the meaning of the horizon of the universe? Is the Earth in a special place? What’s the “dark flow”? Can this explain dark energy? Why don’t we believe it anymore? I discuss these questions a…

What are the origins of the Heisenberg Uncertainty Principle? Is there any way to cheat it? What does this all have to do with waves? I discuss these questions and more in today’s Ask a Spaceman!

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It’s time for school! The Astro101 series will cover some of the most important questions in astronomy. In today’s lesson, we’ll have: What does it take to have a career in astronomy? What does a pro…

It’s time for school! The Astro101 series will cover some of the most important questions in astronomy. In today’s lesson, we’ll have: How did the universe begin? How will it end? What’s going on in …

It’s time for school! The Astro101 series will cover some of the most important questions in astronomy. In today’s lesson, we’ll have: What is a galaxy? What does our own galaxy look like? What are t…

It’s time for school! The Astro101 series will cover some of the most important questions in astronomy. In today’s lesson, we’ll have: What is a white dwarf? What is a neutron star? What is a black h…

It’s time for school! The Astro101 series will cover some of the most important questions in astronomy. In today’s lesson, we have: What’s the difference between a “dwarf” and “giant” star? How are s…

It’s time for school! The Astro101 series will cover some of the most important questions in astronomy. In today’s lesson, we’ll have: What are the different kinds of stars? Why does classification i…

It’s time for school! The Astro101 series will cover some of the most important questions in astronomy. In today’s lesson, we’ll have: How did the solar system form? What is a “planet” and who decide…

It’s time for school! The Astro101 series will cover some of the most important questions in astronomy. In today’s lesson, we’ll have: Why did people used to study astronomy? Why do they continue to …

What does the “emdrive” claim to do? How does it violate almost all of known physics? What were the problems with the experiments? I discuss these questions and more in today’s Ask a Spaceman!

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What can possibly replace the singularity? What are Planck stars and Gravastars? What’s it like to fall into a rotating black hole? I discuss these questions and more in today’s Ask a Spaceman!

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When stars die, do their planets die too? What can possibly survive after a supernova explosion? How will the death of the sun affect our solar system? Can zombie planets rise from the dead? I discus…

What are the accomplishments of black astronomers and physicists? Why does diversity remain so low in higher education, especially physics? What can we do to prevent bias and discrimination? I discus…