Astronomy Cast
Astronomy Cast offers you a fact based journey through the cosmos. Each week Fraser Cain (Universe Today) and Dr. Pamela Gay (SIUE / Slacker Astronomy) take on topics ranging from the nearby planets to ubiquitous dark matter.
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Episode 46: Stellar Nurseries
We've discussed star formation in the past, but now we ...
We've discussed star formation in the past, but now we wanted to talk about the different kinds of stellar nurseries we see across the Universe. We know where our Sun came from because we can look out and see different stellar neighborhoods at every stage
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Episode 45: The Important Numbers in the Universe
This week we wanted to give you a basic physics ...
This week we wanted to give you a basic physics lesson. This isn't easy physics, this is a lesson on the basic numbers of the Universe. Each of these numbers define a key aspect of our Universe. If they had different values, the Universe would be a change
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Episode 44: Einstein's Theory of General Relativity
If you remember way back to Episode 9, we covered ...
If you remember way back to Episode 9, we covered Einstein's Theory of Special Relativity. Well, that's only half of the relativity picture. The great scientist made an even more profound impact on physics with his theory of general relativity, replacing
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Episode 43: Questions, Questions #5
It's time to answer the questions again. And this time ...
It's time to answer the questions again. And this time we've got some doozies. Is the Universe rotating? Is space something, or is it nothing? Is dark energy evenly distributed? What would happen if an astronaut went out the airlock, without a spacesuit.
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Episode 42: Magnetism Everywhere
You probably don't realise it, but magnetic fields are everywhere. ...
You probably don't realise it, but magnetic fields are everywhere. We're not talking about the magnets in your speakers, your electronic equipment or on the fridge door. We're talking about the gigantic magnetic fields that surround planets, stars, galaxi
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Episode 41: The Rise of the Supertelescopes
The last decade has been the golden age of astronomy, ...
The last decade has been the golden age of astronomy, with new observatories and space telescopes pushing out our understanding of the Universe. We can see billions of light years away, watch dynamic events unfold in almost real-time, and see into every c
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Episode 40: American Astronomical Society Meeting, May 2007
Once again, Pamela does her duty as an astronomer and ...
Once again, Pamela does her duty as an astronomer and joins her colleagues at the American Astronomical Society's meeting, held in May, 2007 on Honolulu, Hawaii. With all that sand, surf and sun, how did anyone get any science done? Pamela tracked down th
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Episode 39: Astrology and UFOs
While Pamela's away at the American Astronomical Society meeting, we ...
While Pamela's away at the American Astronomical Society meeting, we brought in a special guest to help debunk some of the pseudoscience that people mistake for astronomy. Dr Steven Novella from the Skeptic's Guide to the Universe gets to the bottom of as
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Episode 38: Neutron Stars and their Exotic Cousins
Huge stars become black holes, and small stars become white ...
Huge stars become black holes, and small stars become white dwarfs. But medium-sized stars can become neutron stars; exotic objects that overcome the nuclear force holding protons and electrons apart. What was once the size of a star is compressed down to
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Episode 37: Gravitational Lensing
Astronomers are always trying to get their hands on bigger ...
Astronomers are always trying to get their hands on bigger and more powerful telescopes. But the most powerful telescopes in the Universe are completely natural, and the size of a galaxy cluster. When you use the gravity of a galaxy as a lens, you can pee
