Tag Archives: io9

Ask a Physicist: What's the shape of the universe

Huzzah! My latest is up at io9: If you keep going around the universe, will you end up where you started? And, if you’d like an even more awesome graphic to illustrate the shape of the universe, check out Jeff’s … Continue reading

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Tomorrow's Column: The Shape of the Universe

Tomorrow in io9 I’ll be answering a question about the shape of the universe: What’s up with the concept of “shape” applied to the universe? How can something with no practical boundaries have a shape? I couldn’t, in good conscience, … Continue reading

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Ask a physicist: What would a teaspoonful of neutron star do to you?

Hey folks, my latest column column is up: “What would a teaspoonful of neutron star do to you?” If this looks a wee bit familiar, it should. However, I’ve added lots more doomsday awesomeness. As always, if you have questions … Continue reading

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Ask a Physicist: Are we Surrounded by Dyson Spheres?

My latest “Ask a Physicist” column is up at io9. This week, I’ve got a mashup of extraterrestrials, dark matter, lensing, and Big Bang nucleosynthesis. The question is: “Are we surrounded by Dyson Spheres?” (A: no.) If you’re checking out … Continue reading

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Ask a Physicist: Is the periodic table the law, or just a good idea?

Hi folks, my latest “Ask a Physicist” is up. The question, posed by io9’s own Charlie Jane Anders and Annalee Newitz is “Is the periodic table the law or just a good suggestion?” I talk about isotopes, radioactive decay, and … Continue reading

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Ask a Physicist: What does it take to discover an earth-like exoplanet?

In my latest column, I give an overview on how we search for exoplanets, how we’re just now at the point of finding new terrestrial planets, and why we might miss a second earth, even if it was practically right … Continue reading

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Ask a Physicist: What really happened right after the big bang?

Greetings, niners! My latest “Ask a Physicist” column is up: “What really happened right after the big bang?” It’s an exploration of inflation theory, and why we buy it. I should mention that inflation is one of those ideas that … Continue reading

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Ask a Physicist: What makes Black Holes so Black?

Hey y’all! My latest column is up: “What makes black holes so black?” I’m afraid the new io9 frontpage is a bit punitive, and things drop off of it nearly immediately. I think this is one of my better ones … Continue reading

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Ask a Physicist: How large is the universe?

Hey everyone. My latest column is up: “How can we measure the size of the universe?” I talk all about the various ways of measuring distance in the universe and why, even though the big bang was about 14 billion … Continue reading

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Cosmological Distances

Yesterday, I posted a poll on our Facebook fan page asking what topic I should cover in this week’s Ask a Physicist. The winner is: The universe, as you’ve probably heard, is expanding. This has all sorts of cool implications … Continue reading

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