Astronomy Cast Full Raw Feed

A recent image from the South African MeerKAT Telescope blew our minds. It was a high resolution image of the center of the Milky Way showing delicate filaments and other structures. What was so mind blowing is that this was an image from a radio telescope. Today we're gonna talk about why this was such an accomplishment and what the future holds for radio astronomy. https://www.sarao.ac.za/media-...

Pulsars are the rapidly spinning degenerate husks of dead stars, turning hundreds of times a second. But they're also handy clocks, spinning with such certainty and accuracy that astronomers can use them for all kinds of stuff. We might even use them to navigate the cosmos.

In a rare moment of weakness, Pamela has decided she's open to the possibility that a future exists. That missions, telescopes and spacecraft are going to be built and they're going to do science. Today we'll talk about what we're looking forward to before she changes her mind and my naive optimism for the future.

With all the success of James Webb so far, it's looking like science's huge gamble is going to pay off, but there were years of delays and budget overruns. What impacts did these delays have on science, careers, and the future of space exploration?

Once again, it's time to take a look at the Sun. You know, the ongoing thermonuclear explosion of fusing hydrogen that's right over there. Fortunately, there's a fleet of spacecraft and ground observatories ready to give our best ever view of the Sun, so we can watch it. Always watching…

It's been about a thousand years since since we last looked at Mercury. So we figured it's time for an update. What new things have we learned about Mercury? Or even new questions! Fortunately there's a mission on the way to help us get some answers.

We continue our refreshed tour of the solar system, checking in on the inner terrestrial planets, Mercury, Venus, Earth and Mars. What have we learned about the formation, evolution and what they might tell us about planets across the Universe.

We've reached the end of 2021 and this is the last episode of the year. Let's look back at the big space events of the last year and talk about what we're looking forward to in 2022.

We've talked about the icy objects of the Solar System, today let's talk about space rocks. There's a surprising variety of rocky material in the Solar System, and each object has a story to tell about the history and formation of the planets, moons and other rocky bodies.

Are asteroids dangerous? Well, just ask the dinosaurs and they'll tell you a sad story of fiery death. It turns out we're in a shooting gallery of space rock and metal. And somewhere out there there's one with our name on it. Should we be worried? Or are the risks so minimal to be irrelevant.

So a rock is a rock is a rock. Right? Across the solar system there are giant rocky asteroids and even "gianter" rocky moons. What is the difference between these two families of objects and where do they come from?

For the longest time the only gas giant planets that we knew about were Jupiter and Saturn. But now, in the age of extrasolar planets, astronomers have discovered thousands of gas giants across almost as many star systems. What new discoveries have been made about gas giants, both here in the solar system and across the Milky Way?

Good News! Over the next few years we're gonna see a flotilla of new missions headed to Jupiter and Saturn. Why aren't we seeing more missions to the outer planets like Uranus and Neptune, even Pluto? It turns out those places are far away. Today let's talk about the challenges of exploring the outer, outer solar system.

The outer Solar System is far enough from the Sun that water doesn't get blasted away into deep space. In this icy realm, there are many worlds with vast quantities of water ice. Today let's look at the icy outer moons and dwarf planets.

So we're learning more & more about the outer planets of the solar system. Uranus & Neptune are Ice Giants, filled with water and other volatiles that we'd consider ice if it was here on Earth. What's inside these worlds and what can we expect to find across the Milky Way as we find more?

Funding for basic science has always been tricky business, coming mainly from universities, government, companies or wealthy individuals. But who knows how many fascinating discoveries were never made because of a lack of funding. And we now live in an era where regular people can come together to fund scientific discoveries.

Well, you're familiar with the Hubble Space Telescope of course, but it's just one of NASA's Great Observatories. After Hubble came 3 more incredible telescopes. Each greater than the last! (That's not true… The first one was the greatest.) But together they would fill in almost the entire electromagnetic spectrum.

After Pluto lost its planethood we were down to 8 planets. But there's growing evidence of another world or worlds out beyond the orbit of Pluto. Is Planet 9 out there and how will we find it? Could there even be a Planet 10?

So there are asteroids, and there are comets. But there's an entirely separate class of objects called centaurs. But instead of half human, half horse, imagine an object that's half comet, half asteroid, but 100% interesting!

It's been 15 years since Pluto was kicked out of the planet club. It also happens to be the topic of our very first episode of Astronomy Cast more than 600 episodes ago. Are there any updates? Does Pluto have a chance of regaining planethood again?

Last week we talked about the various ways that astronomers could detect the presence of intelligent civilizations by observing technosignatures. This week we'll give you an update on the state of the search for extraterrestrials. This field has gone from a collection of pariahs to a completely legitimate field of research. What's changed?

Last week we talked about what it's going to take to confirm basic biological life across the Solar System and the Milky Way. This week, we'll discuss what it's going to take to detect intelligent life out there in space.

Are we alone in the Universe? It's one of the biggest scientific questions we can possibly ask. And yet, with rovers on Mars, missions planned to visit Europa and Ganymede. Powerful telescopes able to detect the atmospheres of exoplanets, we're closer than ever to finding out the answer.

Volcanos can be some of the worst natural disasters that we can experience here on Earth. But life wouldn't even exist without them. So, what are volcanos good for anyway?

As you all know, Pamela refuses to talk about any missions which aren't actually doing science. Well, Perseverance has crossed the line, from fantasy to an actual working rover, scooping regolith and yeeting helicopters. What has the rover accomplished in its first 100 days?