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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Ep. 83: Wave Particle Duality
Have you ever heard that photons behave like both a ...
Have you ever heard that photons behave like both a particle and a wave and wondered what that meant? It's true. Sometimes light acts like a wave, and other times it behaves like a little particle. It's both. This week we discuss the experiments that demo
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Ep. 82: Space Junk
We're polluting every corner of our own planet, so it ...
We're polluting every corner of our own planet, so it only makes sense that we'll take our trashy habits out into space with us. This week we look at the myriad of ways we're messing up space, from the trash orbiting the planet to the radiation we're leak
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Ep. 81: Questions on the Shape Size and Centre of the Universe
As predicted we got a lot of questions from people ...
As predicted we got a lot of questions from people about our trilogy of shows on the size, shape and centre of the universe. Today we'll do our best to clear them all up.As always, if you're still confused drop us an email to info at astronomycast dot com
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Ep. 80: Craters
Pamela's attending the 39th Lunar and Planetary Sciences Conference, and ...
Pamela's attending the 39th Lunar and Planetary Sciences Conference, and you know what that means: the Moon… and planets! When you think of the Moon, you think of craters. In fact, that's a big theme this week at the conference, so Pamela took it as inspi
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Ep. 79: How Big is the Universe?
We’re ready to complete our trilogy of discovery about the ...
We’re ready to complete our trilogy of discovery about the universe. We’ve learned that it has no center; rather everywhere is its center and nowhere. We discovered that the universe seems to be flat. It not open, it is not closed, it is flat. If that doe
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Ep. 78: What is the Shape of the Universe?
Some of the biggest questions in the universe depend on ...
Some of the biggest questions in the universe depend on its shape. Is it curved? Is it flat? Is it open? Those may not make that much sense to you, but in fact it’s very important for astronomers. So which is it? How do we know? How did we figure it out?
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Ep. 77: Where is the Centre of the Universe?
There are some people – I’m not naming names – ...
There are some people – I’m not naming names – who think the universe revolves around them. In fact, for most of humankind, everybody thought that. It’s only been in the last few hundred years that scientists finally puzzled out that the Earth isn’t the c
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Ep. 76: Lagrange Points
Gravity is always pulling you down, but there are places ...
Gravity is always pulling you down, but there are places in the solar system where gravity balances out. These are called Lagrange points and space agencies use them as stable places to put spacecraft. Nature is on to them and has already been using them
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Student Questions: Curtis High School
This is our second installment in our series of student ...
This is our second installment in our series of student questions shows and these questions come to us from Curtis High School.
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Ep. 75: Stellar Populations
After the big bang, all we had was hydrogen, a ...
After the big bang, all we had was hydrogen, a little bit of helium, and a few other trace elements. Today, we’ve a whole periodic table of elements to enjoy, from oxygen we breathe to the aluminium cans we drink from to the uranium that powers some peopl
