Astronomy Cast Full Raw Feed

The Earth's atmosphere protects us from a Universe that is definitely trying to kill us. But it also blocks our view of the entire cosmos, like seeing X-rays and gamma radiation. Space telescopes are changing our view of the most extreme events in the Universe.

Day by day we're loosing our connection with the night sky. Already one third of humanity lives in so much light pollution that they can't see the Milky Way without a drive. And now satellite constellations are adding additional light pollution, even in the darkest skies on Earth.

Today we are gonna gaze into the future of space and astronomy. What upcoming missions & events are we excited about?

Pamela has told us in the most flowery terms about the diffuse dust across the inner solar system left over from the formation of the inner planets. well, it turns out she was wrong. Super wrong. Time to update!

You've probably heard of dark matter and dark energy, but maybe you don't fully understand what they are. Or maybe the idea itself just rubs you the wrong way and you'd like to know why scientists think they can just make stuff up like this. So you'd like to overturn cosmology? Here's all you need to do.

It's been a while since we checked to make sure the Universe was still expanding. Yeah, apparently, that's still a thing. But in the last few years powerful new telescopes and expansive surveys have given us much more knowledge about what's happening. Especially at the earliest times.

You might be familiar with the cosmic microwave background, but that's just one of the background radiations that astronomers look at. Some are well known and cataloged. While others are just starting to be possible to see at all. All of them tell us more about our Universe.

This is gonna be another one of those evergreen topics where we come back again and again. Finding planets. Every time we talk about this now it seems like we've gained thousands of new planets. Well, buckle up! New techniques will grow that by tens of thousands and even millions!

Pamela is always loath to talk about spacecraft until the mission's in space and the science is rolling. NASA's Juno Mission just received a mission extension, adding Jupiter's moons to the menu. Now, finally, we can talk about Juno! [Ed. Juno what I mean?]

Stars often come in groups of 2 or more. And if they're orbiting close enough to each other one star can feast on the other and when that happens, well, mayhem ensues!

Some of the most powerful explosions in the Universe are gamma-ray bursts, capable of blasting a beam of death half way across the galaxy. In just the last few years astronomers have discovered a tremendous amount about these blasts and what's actually causing them. The answer, of course, is that it's more complicated than we originally thought. The old Gamma-Ray bursts show: http://www.astronomyc...

Remember the good old days when there were only a few thousand living and dead satellites? Well, those days are long over. We're now entering an era where there will be tens of thousands of satellites. Not to mention the spent rocket boosters and other space junk. What kind of risk do we face and what can be done about it?

2024 can't come soon enough. You know, that's the year when humans will set foot on the Moon again. Now don't you roll your eyes! That's the plan. Unless the plan changes. But my point is, explorers going to the Moon will need to be concerned about all kinds of hazards, like dust, radiation and gigantic Moon worms. I believe.

We've talked about the Moon and its water many times here on Astronomy Cast, but there've been a bunch of big updates thanks to new research from NASA and others. Today we're gonna give you an update on the state of water on the Moon and the plans to take advantage of it.

All eyes are on the Moon. We're going back, this time to stay, right? One of the best resources on the Moon will be the lava tubes that criss-cross the subsurface of the Moon. These can provide protection from space, and a look at the geologic history of the Moon, and they can be enormous!

So the Moon is about to become a very busy place with multiple countries and private companies planning missions in the next few years. It's been decades since the Outer Space Treaty was negotiated. It's time for the Artemis Accords!

As scientists continue to explore the Earth, they're discovering life, surviving and even thriving in extreme environments. What hints can this give us about what we might find as we search for live on other worlds.

Astronomers are finding even more new extrasolar planets and they're starting to discover entirely new categories. There are classes of planets out there that we just don't have any analog here in the solar system. Let's talk about them!

So with a sample of asteroid Bennu firmly inside OSIRIS-REx's return capsule, it's time to bring this treasure home. So scientists can study the composition and history of the space rock. But it's not the only sample return mission out there, with Japan's Hayabusa II mission also bringing asteroid debris home. So today, let's talk about the missions and what we've learned so far.

This year's Nobel Prize in Physics was awarded to three brilliant researchers who worked out some of the secrets of black holes. Today we're going to talk about the chain of discoveries that led to this award.

Did you hear the news? Nobel prizes for Black Holes! Now, we know there are stellar mass black holes and supermassive black holes, but how do you get from one to the other? How do black holes get more massive?

Don't ever accuse us of not comprehensively covering every kind of exploding star. This week we gather up all the left over ways that stars partially or fully explode or don't. Probably. Enjoy!

So you think that a white dwarf star is the end of a stellar life, and it's all downhill from there, a long, slow cool down towards the end of everything. But in some situations even dead stars can get exciting again, briefly becoming some of the brightest objects in the Universe. And maybe, just maybe, the last exciting thing that'll ever happen in the Universe.

I've got some bad news for you. Stars die. At some point in the next few billion years or so our Sun is going to start heating up, using up all the fuel in its core, and then eventually die, becoming a white dwarf. It'll then slowly cool down to the background temperature of the Universe, becoming a black dwarf. Let's learn about this fascinating process.

So have you heard the news? Of course you have. Evidence of phosphene on Venus. Which could be a biosignature of life on our evil twin planet. There have been a lot of surprising stories about Venus, so let's get you all caught up!