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Ep. 398 – Seeing Things: Emitting, Reflecting, Ionizing Light

Podcast: Play in new window | Download (0.0KB) Astronomers gather electromagnetic radiation with the telescopes: mostly visible light. But sometimes they’ve got to be clever about where they look for these elusive photons. Light can get emitted, absorbed, reflected, and each method tells...

Ep 386: Orbiting Observers

Podcast: Play in new window | Download (0.0KB) The atmosphere keeps us alive and breathing, but it really sucks for astronomy. Fortunately, humanity has built and launched space telescopes that get above the pesky atmosphere, where the skies are really clear. Let’s take a look at the past, current...

Ep. 384: Escaping Probes

Podcast: Play in new window | Download (0.0KB) The gravity of the Earth is a tough thing to escape, but breaking free from the gravity of the Sun is on a whole other level. But humans have achieved this amazing accomplishment, and right now there are several spacecraft leaving the Solar System and...

Ep. 380: The Limits of Optics

Podcast: Play in new window | Download (0.0KB) Astronomers rely on the optics of their instruments, and there are some basic limits that you just can’t avoid. Whatever we look at is distorted by the optics, in fact, a basic property of light means that we’ll never get perfect optics....

Ep. 369: The Fizeau Experiment

Podcast: Play in new window | Download (0.0KB) Light is tricky stuff, and it took scientists hundreds of years to puzzle out what this stuff is. But they poked and prodded at it with many clever experiments to try to measure its speed, motion and interaction with the rest of the Universe. For example,...

Ep. 367: Spitzer does Exoplanets

Podcast: Play in new window | Download (0.0KB) We’ve spent the last few weeks talking about different ways astronomers are searching for exoplanets. But now we reach the most exciting part of this story: actually imaging these planets directly. Today we’re going to talk about the work...

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