This week we’re going to talk about famous stars. But not those boring human ones you read about in People magazine. No, we’re talking about those hot balls of plasma across the distant Universe. The close ones, the bright ones, the massive ones, the giant ones. Let’s get to know some famous stars.
AstronomyCast
Ep. 155: Dwarf Stars
We think we live near an average star, but that’s not the case at all. Compared to most stars in the Universe, the Sun is a giant! Let’s look at the small end of the stellar spectrum, to stars with a fraction of the size and mass of our own Sun. There are many ways that a star can get small, and they lead dramatically different lives and deaths.
Ep. 154: Dragon*Con Live with Seth Shostak
This week we step away from our regular programming to bring you a live show from Dragon*Con in Atlanta. Pamela shares the stage with SETI researcher Seth Shostak. Together they discuss the technology and science of searching for intelligence, And answer questions from the audience.
Ep. 153: Dark Skies
If you live in a city, it’s possible that you’ve never seen the Milky Way with your own eyes. To really appreciate everything the night skies have to offer, you’ve got to get out of the city, away from the lights, where the skies are really dark. But those places are getting harder and harder to find. Let’s talk about what you can do to find dark skies, fight to make the skies darker, and how to make the most of wherever you live.
Ep. 152: Binary Stars
Did you know that our Solar System is a rarity with its single star. Astronomers believe that most star systems out there actually contain 2 or more stars – imagine seeing a sky with 4 suns. These binary and multiple star systems are a great target for new astronomers, and the dynamics of multiple stars keep astrophysicists busy too. Let’s take a look at what it would be like to live on Tatooine.
Ep. 151: Atmospheres
Take a quick breath. There, that’s what we’re going to talk about today – the atmosphere. And not just the Earth’s familiar atmosphere, but the strange, exotic and deadly atmospheres we find in the Solar System and surrounding extrasolar planets.
Ep. 150: Telescopes, the Next Level
We’ve explained how to get into astronomy and buy your first telescope. Now we’re going to take things to the next level and get you drooling about bigger and better telescopes. If you’re serious about astronomy, what kinds of telescopes will give you the best bang for big bucks?
Ep. 149: Constellation Program
It’s been more than 40 years since humans first set foot on the Moon. But plans are in place to return humans to the surface of the Moon, and maybe even to asteroids and the planet Mars. New rockets, landers and flight technology are all under development. Humans are pushing out into space again, and this time we’re going to stay. Let’s take a look at NASA’s new Constellation Program. What’s been developed so far, and what’s coming up.
Ep. 148: Astronomy and New Media
Astronomy is one of the scientific fields that have been completely shaken up by new media. The Internet has enabled communication between researchers in a dramatic new way, creating new collaborations, removing obstacles, and drawing in an army of enthusiastic volunteers to help with research. Let’s take a look at how new media is helping change astronomy, and how you can get involved.
Ep. 147: How to Be Taken Seriously By Scientists
For those non-scientists trying to get their original ideas accepted by the scientific community, you’ve got to have thick skin. It might seem like there’s a vast conspiracy, or a general attitude that drives away original, but unorthodox ideas. But that’s not true, the reality is that great ideas in science come from everywhere, even amateurs. In this episode we’ll help you understand what scientists will be looking for, and the best ways to be taken seriously.
Ep. 146: Astronomy Research from Idea to Publication
Have you ever wondered how astronomers do their research? How do they go from idea or question, to gathering their data, to publishing the research. What are all the hoops they have to jump through, the paperwork to fill out, and the cool toys they get to use along the way?
Ep. 145: Interstellar Travel
In science fiction it’s easy to hop into your spaceship and blast off for other stars. But the true distances between stars, and the limits of relativity make interstellar travel almost impossible with our current technology. What would it really take to travel from star to star, exploring the galaxy?
Questions Show: Imaging Extrasolar Planets, Infinite Universe, Inside a Black Hole
What will we eventually be able to see on extrasolar planets? What does an infinite Universe mean? And what’s down there, inside a black hole?
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. 144: Space Elevators
If you want to travel into the Solar System, you have to get off the Earth. Traditionally, that meant blasting off in a rocket. But there’s another strategy for escaping the Earth’s gravity. Climb to the top of an extremely tall tower, and just jump away. That’s the idea behind space elevators. Theoretically possible, but practically unfeasible, space elevators have gotten new life thanks to new, super strong materials.
Questions Show: Matter Balance, Jumping Light Speed and Black Hole Star Formation
Why was there a difference between the amount of matter and antimatter at the beginning of the Universe? Mathematics lets us travel faster than light speed, so why can’t we? And are there stars forming around black holes?
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. 143: Astrobiology
We know there’s life in the Universe. We see it all around us here on Earth. But is there life anywhere else? By studying the extremes that life can take here on Earth, scientists are learning just how hardy and adaptable life can really be. And if you consider other ways that life might function, the options open up considerably. This week we’ll discuss the study of life – extreme life here on Earth, and the possibility of finding life on other worlds.
Questions Show: Black black holes, Unbalancing the Earth, and Space Pollution
Why are black holes black? Can a huge mass of humanity make the Earth wobble? And what’s so bad about space pollution anyway?
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. 142: Plate Tectonics
The surface of the Earth feels solid under your feet, but you’re actually standing on a plate of the Earth’s crust. And that plate is slowly shifting across the surface of the Earth. Over geologic timescales, plate tectonics has totally resurfaced our planet, bringing continents together, and tearing them apart. We know we have plate tectonics here on Earth, but what about other worlds?
Questions Show: Avoiding the Heat Death, Orbiting Galaxies, and the Dangers of Space Radiation
Will robots be able to avoid the heat death of the Universe? Can galaxies orbit each other like binary stars? And what are the dangers of space radiation to astronauts on the Moon?
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. 141: Volcanoes, Hot and Cold
You’re familiar with volcanoes, eruptive vents where hot magma escapes the Earth’s interior – sometimes with disastrous effects. But did you know that volcanoes have shaped many of the planets and moons in the Solar System, not just our own Earth? And just in the last few years astronomers have discovered there are cold volcanoes on some of the icy objects in the outer solar system.
Ep. 140: Entanglement
One of the most amazing aspects of quantum mechanics is quantum entanglement. This is the strange behavior where particles can become entangled, so they’re somehow connected to one another – no matter the distance between them. Interact with one particle and the other reacts instantly; even if they’re separated by billions of light-years.
Questions Show: Galileoscope, Black Hole Time, and What Exactly is Energy?
How can you get a Galileoscope of your very own? What happens to time inside a black hole? And what exactly is energy anyway?
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.
Questions Show: Telescope Suggestions, Black Hole Energy, and Universal Time
What starting telescope equipment does the Astronomy Cast team suggest? How much energy does a black hole generate? And how do we measure time outside the Earth?
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. 139: Energy Levels and Spectra
Last week we took a peek into the tiny world of quantum mechanics, and its unintuitive, but very accurate mathematical predictions. And although we all appreciate the physics lesson, you’re probably wondering what this all has to do with astronomy. Well, today we bring it all home and explain how quantum mechanics has given astronomers one of the most powerful tools they have to study the nature of the cosmos.
Questions: An Unlocked Moon, Energy Into Black Holes, and the Space Station's Orbit
What would happen if the Moon wasn’t tidally locked to the Earth? What happens to all that mass and energy disappearing into a black hole? And how can we explain the space station’s crazy orbit?
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.