Fraser Cain
Universe Today
Dr. Pamela Gay
CosmoQuest
It’s been over 20 years since astronomers first discovered that the expansion of the Universe is accelerating thanks to dark energy. And in these decades, astronomers still don’t have much evidence for what could be causing the increased expansion rate. Maybe there’s something else going on to explain it.
Astronomers have made extremely accurate measurements of the expansion rate of the Universe and come up with different results. And the error bars for the observations don’t overlap, so there’s something strange going on. What’s the answer and how can the Crisis in Cosmology be resolved?
Astronomers came together in January to present their newest research, and not surprisingly, the Winter AAS meeting was heavy on news from JWST. What were some of the new results that were announced?
Well, we did it. We made it to episode 666, an auspicious number to be sure. What can we do to celebrate this accomplishment? An episode all about things in the Universe that have been named after mythological people and places in the underworld?
Recent Episodes
It's time to say goodbye to an old friend, NASA's Cassini spacecraft, which has been orbiting within the Saturnian system since 2004. But why does a seemingly healthy spacecraft and mission need to come to an end? Today we look back at the mission, some of the amazing...
This week, we return to our starting point, where Astronomy Cast began: Pluto. 11 years on, we have a whole new appreciate for the dwarf planet Pluto. We've visited it, probed it and taken pictures. It's time for an update. We usually record Astronomy Cast every...
This episode was recorded live in St. Louis, MO at the Astronomy Cast Solar Eclipse Escape 2017. Listen as we discuss how humans might be able to colonize the Milky Way! We usually record Astronomy Cast every Friday at 1:30 pm PDT / 4:30 pm EDT/ 20:30 PM UTC (8:30...
This is a special recording of Astronomy Cast to prepare for the Eclipse, recorded live in St. Louis, MO at the Astronomy Cast Solar Eclipse Escape 2017. We're going to give you a set of last minute tips and info to prepare for the Great American Eclipse! We usually...
As we wrap up season 10 of Astronomy Cast, we look forward to all the instruments, missions and science results on the distant horizon. Think astronomy is exciting already? Just you wait. We usually record Astronomy Cast every Friday at 1:30 pm PDT / 4:30 pm EDT/...
10 years of Astronomy Cast... wow. It's been a long, fun journey. What are some of our favorite episodes and adventures over the decade we've been doing this show. We usually record Astronomy Cast every Friday at 1:30 pm PDT / 4:30 pm EDT/ 20:30 PM UTC (8:30 GMT). You...
Summer is almost here, and for the northern hemisphere, that means warm nights for observing. But what to observe? We're here with a list of events and targets for you to enjoy over the summer. Get your calendars handy, and start organizing some events with your...
Like most of us, you probably want to know what it would be like to travel to space. Maybe not to live, but just to visit. You want to be a space tourist. Good news, there are a bunch of companies working hard to give you the opportunity to fly to space. How long...
In order to live in space, we'll need to live in a habitat that simulates the temperature, pressure and atmosphere of Earth. And one of the most interesting ideas for how to do this will be with inflatable habitats. In fact, there are a few habitats in the works right...
When you think of a robot, you're probably imagining some kind of human-shaped machine. And until now, the robotic spacecraft we've sent out into space to help us explore the Solar System look nothing like that. But that vision of robots is coming back, thanks to a...
On Monday, August 21, 2017, there's going to be a total eclipse of the Sun, visible to path that goes right through the middle of the United States. You should be making plans to see this, and we're here to help you know where to go and what to do. We usually record...
For the final episode in our 3-part episode about animals in space, we look at the largest animals to go to orbit. And I'll just warn you now, this is going to be a really sad episode. We usually record Astronomy Cast every Friday at 1:30 pm PDT / 4:30 pm EDT/ 20:30...
Last week we talked about how the smallest creatures behave in space, but now we move up in size a little to small animals, like mice. What missions have they flown on, and how does micro-gravity affect their biology? We usually record Astronomy Cast every Friday at...
We've talked about animals travelling to space in the past, but it's time to take another look, with many other creatures making the trip to the void. Today we're going to talk about the spineless insects and arthropods, and those tough-as-nails waterbears -...
For this historic 444th episode of Astronomy Cast, we talk about fractals. Those amazing mathematical visualizations of recursive algorithms. What are they, how do you get them? Why are they important? We usually record Astronomy Cast every Friday at 1:30 pm PDT /...
Surf's up! Today we're going to be talking about one of the most devastating natural disasters out there: tsunamis. We're talking huge waves that wreck the seashore. But it turns out, there many ways you can get a tsunami, and one of those has to do with space. We...
If we look back into the geologic record of the Earth, it appears that our planet's magnetic field flips polarity every few hundred thousand years or so. Why does this happen? When's it supposed to happen next? Is it dangerous? We usually record Astronomy Cast every...
Want to travel the world but you don't have a lot of money? No problem, your continent is drifting across the surface of the Earth right now. In a few million years, you'll reach your destination. We usually record Astronomy Cast every Friday at 1:30 pm Pacific / 4:30...
There are regular volcanoes, and then there are the super-volcanoes. Massive calderas of hot magma of incomprehensible size. Bad news, these things explode randomly and catastrophically. Worse news, there are a bunch around the Earth. We usually record Astronomy Cast...
We always want to talk about how we can make Mars more Earth like, but the reality is that we're making Earth more Venus-Like. We're Venus-forming Earth. What are the various factors we're impacting on a global scale, and how can we fix them? We usually record...