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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Questions Show: NorthEast Astronomy Forum (NEAF)
Pamela was lucky enough to attend the NorthEast Astronomy Forum, ...
Pamela was lucky enough to attend the NorthEast Astronomy Forum, and while she was there she held a live questions show. And now you get to join in an hear the interesting questions, and Pamela's interesting answers. If you've got a question for the Astro
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Ep. 134: Ultraviolet Astronomy
Our next visit in this tour through the electromagnetic spectrum ...
Our next visit in this tour through the electromagnetic spectrum is the ultraviolet. You can't see it, but anyone who's spent a day out in the hot sun without sunblock has sure experienced its effects. Ultraviolet radiation is associated with the birth of
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Ep. 133: Optical Astronomy
Optical astronomy; now this is the kind of astronomy a ...
Optical astronomy; now this is the kind of astronomy a human being was born to do. In fact, until the last century, this was the only kind of astronomy anybody ever did. Now we've got the whole electromagnetic spectrum to explore, but our heart still belo
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Questions Show: Undoing Inflation, Searching for Water, and Seeing Everything a Black Hole's Ever Eaten
If there was enough mass to cause a big crunch, ...
If there was enough mass to cause a big crunch, would inflation go backwards too? How do spacecraft know that hydrogen is bonded to water? And why can't we see everything that's ever fallen into a black hole? If you've got a question for the Astronomy Cas
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Ep. 132: Infrared Astronomy
Today we continue our unofficial tour through the electromagnetic spectrum, ...
Today we continue our unofficial tour through the electromagnetic spectrum, stopping at the infrared spectrum - you feel it as heat. This section of the spectrum gives us our only clear view through dusty material to see newly forming planetary systems an
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Ep. 131: Submillimeter Astronomy
Last week we examined the largest wavelength in the electromagnetic ...
Last week we examined the largest wavelength in the electromagnetic spectrum: radio. This week we get a little smaller… but not too small! And look at the next step in the spectrum, the submillimeter. Astronomers have only recently began exploiting this t
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Questions Show: Decelerating Black Holes, Earth-Sun Tidal Lock, and the Crushing Gravity of Dark Matter
This week we wonder if you can made a black ...
This week we wonder if you can made a black hole by accelerating a mass, but then can you un-make it again? Will the Earth ever be tidally locked to the Sun? And can dark matter crush an unsuspecting space ship? If you've got a question for the Astronomy
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Ep. 130: Radio Astronomy
Astronomers are very resourceful, when it comes to light, they ...
Astronomers are very resourceful, when it comes to light, they use the whole spectrum - from radio to gamma rays. We see in visible light, but that's just a tiny portion of the spectrum. Today we're going to celebrate the other end of the spectrum; the ra
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Questions Show: Multiple Big Bangs, Satellite Collisions and the Size of the Universe
This week we wonder if the Universe is going to ...
This week we wonder if the Universe is going to collapse and then expand again, how satellites can have such different velocities, and the size of the observable Universe. If you've got a question for the Astronomy Cast team, please email it in to info@as
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Ep. 129: Interferometry
When it comes to telescopes, bigger is better. But bigger ...
When it comes to telescopes, bigger is better. But bigger is more expensive. Way more expensive. To keep the costs reasonable while improving the sensitivity of their instruments, astronomers use an amazing technique called interferometry. Instead of buil
