black holes

Category archives for black holes

“Why it is that of all the billions and billions of strange objects in the Cosmos — novas, quasars, pulsars, black holes — you are beyond doubt the strangest?” -Walker Percy Black holes. You’ve all heard them before, and you can visualize them pretty easily. How so? Start by thinking about the Earth. Held together…

Q & A: How can anything come from a black hole?

“Consideration of particle emission from black holes would seem to suggest that God not only plays dice, but also sometimes throws them where they cannot be seen.” -Stephen Hawking Last week, I wrote about how high-energy cosmic rays strike Earth’s atmosphere and wind up bombarding everything on Earth’s surface with super-fast moving particles, some of…

“The whole fabric of the space-time continuum is not merely curved, it is in fact totally bent.” -Douglas Adams As many of you know, if you take a whole bunch of mass, and you’ve got nothing going on except gravity, it’s going to gravitationally collapse. And if atoms, nuclei, pressure, and nuclear reactions don’t (or…

“No matter how dark things seem to be or actually are, raise your sights and see the possibilites — always see them — for they are always there. -Norman Vincent Peale Dark matter. I talk about it a lot here for a number of reasons. These include: the fact that it makes up about 85%…

Extreme Tides!

The Truth is far more powerful than any weapon of mass destruction. -Gandhi Last time, I spoke to you about how tides work on Earth. In a nutshell, a nearby massive body (like the Moon or the Sun) pulls on the Earth’s center due to its gravity. But the portion of the Earth that’s closest…

A Black Hole without a Singularity

All that matters, in the real world, is that something is both massive and compact enough so that, within a certain radius, light cannot escape from it. That is the astrophysical definition of a black hole. -me We’ve been talking about black holes a lot recently, and with good reason. They’re fun to think about.…

The Lights Stay On Inside a Black Hole!

The cradle rocks above an abyss, and common sense tells us that our existence is but a brief crack of light between two eternities of darkness. -Vladimir Nabokov Last Friday, I posed a question to you, and you kindly responded by voting as to whether, when you crossed the event horizon of a black hole,…

Believe it or not: A Black Hole Question!

Black holes have come up a couple of times this week, and I’ve always wondered something. When you fall into a black hole, all sorts of strange things happen. The most well-known one is that nothing — not even light — can ever escape once it falls in. Well, my question is, if you fell…

Falling into a Black Hole sucks!

Why it is that of all the billions and billions of strange objects in the Cosmos — novas, quasars, pulsars, black holes — you are beyond doubt the strangest? -Walker Percy When you watch someone fall into a black hole, what you actually see is pretty surprising. You see, a black hole’s gravity distorts the…

Are Black Holes Forbidden Mathematically?

In the comments on one of my posts, someone pointed me towards Stephen Crothers, who gives the following argument (in a nutshell) as to why black holes cannot possibly exist: General Relativity is our theory of gravity, which relates the curvature of space to the gravitational acceleration of objects. This theory only works in certain…