Ep. 114: The Moon, Part 2 – Exploration of the Moon
Let’s continue on our journey to the Moon. Last week we talked about the physical characteristics of the Moon, its appearance in the sky and how it interacts with the Earth. This week we’re going to take a look at how scientists have expanded our understanding of the Moon. From ancient astronomers using nothing more than their eyes and the first telescope observations of Galileo to the exploration by robotic spacecraft. And of course, the first tentative steps by the human explorers of the Apollo program.
Questions Show: Ice in Space, Expansion of the Universe, and Death from the Skies
Another week, another batch of questions. If ice disappears in your freezer, how can it last in space? How can the Universe be expanding faster than the speed of light? And what is the risk from a coronal mass ejection in an airplane? All this and even more questions. If you’ve got a question for the Astronomy Cast team, please email it in to info@astronomycast.com and we’ll try to tackle it for a future show. Please include your location and a way to pronounce your name.
Ep. 113: The Moon, Part 1
Hey, here’s a topic we haven’t really gotten around to yet… the Moon. Today we look at our closest astronomical companion: the Moon. What impact does the Moon have on our lives, where did it come from, who walked on it, and are we ever going to walk on it again? We’re going to learn about the phases, the tides, and even a little bit about NASA’s plans to send humans back to the Moon.
Questions Show: Orbit of the Planets, Green Stars, and Oort Cloud Contamination
We’re back to a theme-less questions show. We’re right across the Universe this time. Why are the planets lined up in a nice flat plane? Why are there no green stars? And is the Oort Cloud contaminating our understanding of the cosmic microwave background radiation? If you’ve got a question for the Astronomy Cast team, please email it in to info@astronomycast.com and we’ll try to tackle it for a future show. Please include your location and a way to pronounce your name.
Ep. 112: Death From the Skies, Interview with Phil Plait
We say it all the time here on Astronomy Cast: the Universe is trying to kill us. This week, Pamela is joined by Dr. Phil Plait to discuss his new book, “Death from the Skies”. Phil and Pamela talk about asteroid strikes, solar flares and gamma ray bursts.
Questions Show: Relativity, Relativity and More Relativity
Everyone loves a theme. And this week we’ve collected together some of your questions about relativity. More light speed spacecraft, twin paradoxes, and the mixing up of gravity, time and mass. If you’ve got a question for the Astronomy Cast team, please email it in to info@astronomycast.com and we’ll try to tackle it for a future show. Please include your location and a way to pronounce your name.
Ep. 111: Nebulae
When you think about the best pictures in astronomy, almost every one is a nebula; the pillars of creation in the Eagle Nebula, or the complex Helix Nebula – or my personal favourite, the Ring Nebula. They’re beautiful, wispy clouds of gas and dust that signify both the birth and death of stars. Today we give tribute to nebulae.
Questions Show: Galactic Dust, the Speed of Photons, and the Big Bang Calculations
Another week, another roundup of your questions. This week listeners asked: what is galactic dust anyway, and where does it come from? Why can photons move at the speed of light? And how can astronomers know what happened right after the Big Bang? And there’s even more. If you’ve got a question for the Astronomy Cast team, please email it in to info@astronomycast.com and we’ll try to tackle it for a future show. Please include your location and a way to pronounce your name.
Ep. 110: The Search for Extraterrestrial Intelligence
You know what this show needs? More aliens. Since we don’t seem to have any visiting right now, we’re going to have to find some. SETI is an acronym. It stands for the Search for Extraterrestrial Intelligence. But there’s more to SETI than just putting up a radio telescope and hoping to catch a glimpse of an alien television broadcast.
Questions Show: Alignment with the Galactic Plane, Destruction from Venus, and the Death of the Solar System
Another week, another roundup of your questions. This week listeners asked: are we all going to die in 2012 when the solar system passes through the galactic plane? Did Venus make the Moon? And what will extraterrestrials see when the Sun is dead and gone? And there’s even more. If you’ve got a question for the Astronomy Cast team, please email it in to info@astronomycast.com and we’ll try to tackle it for a future show.