Astronomy Cast

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Website
http://www.astronomycast.com
Description
Astronomy Cast brings you a weekly fact-based journey through the cosmos.
Language
🇬🇧 English
last modified
2018-12-11 04:58
last episode published
2018-12-10 00:00
publication frequency
8.31 days
Contributors
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Number of Episodes
539
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Episodes

Date Thumb Title & Description Contributors
10.12.2018

Ep. 509: Fiction to Fact: 3D Printers

The technology of 3D printing is taking off. From tiny home-based 3D printers to larger manufacturing. And of course, 3D printing is going to space with the International Space Station and beyond.
3.12.2018

Ep. 508: 2018 Holiday Gift Guide

We did it, we made it to the end of another year. Once again it’s time to wonder what gifts to get your beloved space nerds. We’ve got some suggestions. Some are brand new this year, others are classics that we just can’t help but continue to suggest.
27.11.2018

Ep. 507: From Fiction to Fact : Ion Drive

Ion engines are a mainstay of science fiction, featured in both Star Trek and Wars. But this is a very real technology, successfully used on several missions out there in the Solar System right now. How do they work and what are the limits?
18.11.2018

Ep. 506: It's not Aliens, Unless it's Aliens

Did you hear that astronomers from Harvard think that the interstellar asteroid Oumuamua was actually an alien solar sail? Is it aliens? Of course it's not aliens. But some day, it'll actually be aliens.
12.11.2018

Ep. 505: Seismology

We’re always interested in the surface features of the planets and moons in the Solar System, but that’s only skin deep. It turns out, these worlds have an interesting inner life too. Thanks to the science of seismology, we can peer into our planet and...
5.11.2018

Ep. 504: Radar, Lidar, and Sonar

To really study something, you want to reach out and touch it. But what can you do if you're separated by a huge distance? You reach out with electromagnetic or sound waves and watch how they bounce back. Thanks to radar, sonar and lidar.
29.10.2018

Ep. 503: Gravity Mapping

The Earth looks like a perfect sphere, but down here on the surface we see that there are mountains, rivers, oceans, glaciers, all kinds of features with different densities and shapes. Scientists can map this produce a highly detailed gravity map of o...
22.10.2018

Ep. 502: No Touching: Determining Composition of Worlds Remotely

How do you know what something is made of if you can't reach out and touch it? How do we know what planets lights years away have in their atmosphere? What about the rocks all around Curiosity? Or the geysers coming out of Europa and Enceladus? Scienti...
8.10.2018

Ep. 501: Water Worlds Revisited

We're not learning that the vast majority of potentially habitable worlds out there are actually icy moons like Europa and Enceladus. Good news, there are hundreds, if not thousands of times more of them than worlds like Earth. Bad news, they're locked...
17.09.2018

Ep. 500: Live Celebration!

Welcome to episode 500 of Astronomy Cast. To celebrate this momentous occasion, we’re going to look back 500 years into the past to see what we learned about the Universe. And then we’re going to look 500 years into the future.
10.09.2018

Ep. 499: What is the proposed Hubble-Lemaitre Law?

We started out Astronomy Cast with the controversal decision to de-planet Pluto. And here we are, more than a decade later, at the brink of recording our 500th episode when another big decision is coming down from the IAU: whose name goes on the concep...
10.09.2018

Ep. 499: What is the proposed Hubble-Lemaitre Law?

We started out Astronomy Cast with the controversal decision to de-planet Pluto. And here we are, more than a decade later, at the brink of recording our 500th episode when another big decision is coming down from the IAU: whose name goes on the concep...
1.07.2018

Ep. 498: Dwarf Galaxy Update

The Milky Way has gobbled up dozens of dwarf galaxies and added them to its structure. Today we're going to look at the ongoing hunt for the wreckage of past mergers. And what we've discovered about dwarf galaxies in general.
1.07.2018

Astronomy Cast: On Hiatus until September 2018

Astronomy Cast will be on hiatus for July and August. Don't worry, we'll be back in September, and will be gearing up for our 500th episode!
25.06.2018

Ep. 497: Update on Globular Clusters

Is it globular clusters or is it globeular clusters? It doesn't matter, they're awesome and we're here to update you on them.
18.06.2018

Ep. 496: Update on Stellar Populations I, II, and III

Another update show, this time on the various generations of stars, let's get into it.
4.06.2018

Ep. 494: Icy Moons Update 2018

Thanks to Cassini and other spacecraft, we've learned a tremendous amount about the icy worlds in the Solar System, from Jupiter's Europa to Saturn's Enceladus, to Pluto's Charon. Geysers, food for bacteria, potential oceans under the ice and more. Wha...
28.05.2018

Ep. 493: Mars Update 2018

If there's one place we've learned more about in the last 10 years, it's Mars. Thanks to all those rovers, orbiters, landers which are flying overhead, crawling around the surface, and digging into the rich Martian regolith. What have we learned about ...
21.05.2018

Ep. 492: Comets, Asteroids and KBO's

Another topic with plenty of updates. Since we started Astronomy Cast we’ve visited many smaller objects in the Solar System up close, from Ceres and Vesta to Pluto, not to mention a comet. What have we learned?
14.05.2018

Ep 491: Exoplanet Update 2018

Finally, a big update. Have there been news in the realm of exoplanets? More news that we can possibly cover. But we’ll try our best.
7.05.2018

Ep 490: What's New with Supernovae

Time for another update, this time we're going to look at what's new with supernovae. And once again, we've got good news, lots of new stuff to report.
30.04.2018

Ep 489: Black Hole Update

Another update episode, this time we look at what’s new and changed in the research of black holes. And it’s here that we find a lot of substantial new discoveries in the field, so much has been discovered since we first covered black holes a decade ag...
23.04.2018

Ep 488: Dark Energy: 2018 Edition

The updates continue. Last week we talked about dark matter, and this week we continue with its partner dark energy. Of course, they’re not really partners, unless you consider mysteriousness to be an attribute. Dark energy, that force that’s accelerat...
13.04.2018

Ep 487: Dark Matter: 2018 Edition

Last week, we gave you an update in particle physics. This week it’s time to see what’s new in the world of dark matter. Spoiler alert, we still have no idea what it is, but maybe a few more ideas for what it isn’t.
6.04.2018

Ep 486: Particle Physics Update

It’s time for a news update. This time from the field of particle physics. It turns out there have been all kinds of new and interesting particles discovered by the Large Hadron Collider and others. Let’s get an update from Pamela.
30.03.2018

Ep 485: Docking, Refueling, and Transferring

It’s one thing to get to space. But once you’ve made it there, what do you want to do? You’ll probably want to dock with another space ship, deliver cargo, refuel. Today we’ll talk about how all that happens.
23.03.2018

Ep 484: Transfer Orbits and Gravitational Assists

If you want to get around in the Solar System, you’ll want to take advantage of natural gravitational speed boosts and transfer orbits. Whether you’re heading to the outer Solar System or you want to visit the Sun itself, the planets themselves can hel...
16.03.2018

Ep 483: Stopping in Space

It’s one thing to get from Earth to space, but sometimes you want to do the opposite. You want to get into orbit or touch down gently on the surface of a planet and explore it. How do spacecraft stop? And what does that even mean when everything is orb...
9.03.2018

Ep 482: Alternative Ways to Space

Getting to space is all about rockets, but people are trying to figure out other methods that could carry payloads to orbit and beyond. Railguns, airplanes, tethers and more. Today we’ll talk about alternative methods of spaceflight.
2.03.2018

Ep 481: Rockets pt. 3 - Going Faster, Higher, Farther after Fairing Separation

We’ve seen rockets blast off from here on Earth. But that’s only half the story. Rockets have additional stages to push them into trajectories, like transfer orbits and various orbital maneuvers. Let’s talk about what happens after the rocket is long g...
23.02.2018

Ep 480: Rockets pt. 2- Multi-stage Boosters

The vast majority of rockets are multi-staged affairs. Why is this? What makes this kind of rocket so successful? Today we look at the ins and outs of multi-stage rockets.
16.02.2018

Ep. 479: Rockets pt. 1- What Does "Single Stage To Orbit" Really Mean?

To celebrate the launch of the Falcon Heavy, we figured it was time for an all new series, this time on the rockets that carry us to space. Today we're going to talk about why single stage to orbit rockets are so difficult to carry out.
2.02.2018

Ep. 477: State of Exploration: Once and Future Moon

It's been decades since humans set foot on the Moon. Well, it's time to go back, in theory. Of course, we've heard this all before. What are the plans afoot to send humans back to the Moon this time. What hardware will we use, and what other strategies...
26.01.2018

Ep. 476: The Overview Effect

After they’ve been to space, many astronauts report that seeing the world from above has given them a totally new perspective on humanity and the state of our planet. It’s called the Overview Effect. Today we’ll talk about this, and what this perspecti...
19.01.2018

Ep. 475: Fast Radio Bursts

You know what's fun? Mysteries. Here's one: fast radio bursts. Astronomers have been detecting mysterious one-time signals from across the sky. What's causing them? Nobody knows for sure, but the search is on to get to the bottom of them.
12.01.2018

Ep. 474: Predictions for 2018

Phew, 2018, time to press the reset button and enjoy a whole new year of space exploration and space science. What’s coming up this year? What should we expect to launch, and what will we see in the sky?
5.01.2018

Ep. 473: Remembering the Best Space Science of 2017

2017 was a crazy year for, well, you know. But, it was a great year for space science, a kilonova, extrasolar planets, reusable rockets and more. Let’s look back at the year that was and remember our favorite space science.
29.12.2017

Ep. 472: Best Modern Sci Fi for the Science Lover - Part 4: Bioscience

What happens when the future meets biology? Bioscience science fiction, of course. And that's our focus today as we continue our journey though science-based science fiction.
29.12.2017

Ep. 472: Best Modern Sci Fi for the Science Lover - Part 4: Bioscience

What happens when the future meets biology? Bioscience science fiction, of course. And that's our focus today as we continue our journey though science-based science fiction.
22.12.2017

Ep. 471: Best Modern Sci Fi for the Science Lover - Part 3: Human Computer Relations

It's time to talk computers, and how we're going to be dealing with them in the future. In our next segment on modern sci-fi, we talk about the future of the human-computer interface.
15.12.2017

Ep. 469: Best Modern Sci Fi for the Science Lover - Part 1 Space Exploration

Our journey through interesting science fiction, this time we talk about speculative fiction dealing with materials science, nanotechnology and 3D printing. It’s a staple in Star Trek, but what other stories deal with it?
8.12.2017

Ep. 469: Best Modern Sci Fi for the Science Lover - Part 1 Space Exploration

We’ve always been fans of science fiction, but we really like our science. Today we’ll talk about some books we’ve been reading recently that do a good job of dealing with the science in science fiction.
1.12.2017

Ep. 468: Simulations for Science and Fun

Astronomers depend on simulations to study the Universe. From relatively straightforward orbital simulations to vast simulations that try to recreate the large scale structure of the Universe from the Big Bang. Today we're going to talk about some of t...
19.11.2017

Ep. 467: Resonance

Many of the moons and planets across the Universe are in resonance with each other and their star. What causes this resonance, and how can it help us understand the history of planetary formation and migration?
17.11.2017

Ep. 466: Origins of Zero (0)

We depend on zero for our math to work right, but this number was actually invented in fairly recent times. Why do we need zero? Was it inevitable?
10.11.2017

Ep. 465: Exploiting Interfering Light

Electromagnetic radiation, also known as “light” is pretty handy for astronomers. They can use it to directly and indirectly observe stars, nebula, planets and more. But as you probably know, light can act like a wave, creating interference patterns tt...
6.11.2017

Ep. 464: Why the Hype over an Exorock?

Astronomers this week announced that they had discovered an asteroid or comet on a trajectory that brought it from outside the Solar System? Is this the first case of an object from deep space? And what can we learn from this discovery?
30.10.2017

Ep. 463: Pareidolia and the Moon

The man in the moon, the pyramids on Mars. Every cloud, ever. Humans have a tendency to pattern match when they're looking around the Universe - it's called pareidolia. What causes this behaviour, and how can we use this to debunk some hilarious conspi...
23.10.2017

Ep. 462: Modeling the Weather

Have you noticed that weather forecasting has gotten much better in the last few years? Thanks to weather satellites, weather stations, and better forecasting techniques. How do scientists predict the weather with any kind of accuracy days or even week...
16.10.2017

Ep. 461: Measuring the Weather with Satellites

What’s the weather doing? Is it going to rain today? How much? What about temperatures? We depend on modern weather forecasting, thanks, in part to the vast network of weather satellites. What instruments do they have, what orbits do they use.