Tag Archives: black holes

I get email: Why doesn't a black hole get infinitely massive?

Greetings, relativists. I got an email from a former high school science teacher named Jeffrey that I thought would be fun to do here, rather than in the column. This is a fair bit more mathematical than even my normal … Continue reading

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I get email: Time and Gravity

Every now and again, I like to share fun questions that aren’t right for the column, but which you guys might find interesting. For example, check out this, this, or this. As I’ve done in the past, I’m going to … Continue reading

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How long do you have to rescue someone from a black hole?

Forever, and if you hold tight for a bit, I’ll explain why. I’ve been teaching a grad course in general relativity this term, and I’ve been having the time of my life. While my own work in gravitational lensing uses … 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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Black holes…

My latest “Ask a Physicist” is up at io9: How long does it take for you to fall into a black hole? Enjoy! -Dave

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