Astronomy Cast Ep. 211: Celestial Navigation

Celestial sphere.

Before there was GPS, navigators had to rely on the Sun and the stars to find their way around the Earth. It’s easier than it sounds, if you’ve got the right instruments, clear skies, and a really accurate clock. Let’s examine the history of celestial navigation, learn about the different methods, and then give you some practical ways that you can go out and learn how to do this for yourself.

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Celestial Navigation – Show notes and transcript

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Astronomy Cast Ep. 209: Exotic Life

Is this arsenic based life?

We don’t like to cover news on Astronomy Cast, but sometimes there’s a news story that’s interesting, complicated, and rapidly unfolding – and it happens to cover an area that we haven’t talked much about. So today we thought we’d talk about the discovery of arsenic-based life, and exotic forms of life in general. Maybe we need to redefine our definition of life. Or maybe we just got introduced to some distant cousins.

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Episode 209 Show notes and transcript

Astronomy Cast Ep. 208: The Spitzer Space Telescope

The Spitzer Space Telescope. Credit: NASA

Last week we talked about Lyman Spitzer, and this week we’ll take a look at the orbiting observatory that bears his name: the Spitzer Space Telescope. Designed to see into the infrared spectrum, Spitzer has returned images of objects that were previously hidden to astronomers by thick shrouds of gas and dust.

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Spitzer Space Telescope – Show notes and transcript

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Astronomy Cast Ep. 207: Lyman Spitzer

Lyman Spitzer

Time for another action-packed double episode of Astronomy Cast. This week we focus on the Lyman Spitzer, a theoretical physicist and astronomer who worked on star formation and plasma physics. Of course, this will lead us into next week’s episode where we talk about the mission that bears his name: the Spitzer Space Telescope.

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Lyman Spitzer – Show notes and transcript

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Astronomy Cast Ep. 206: Fission

Nuclear reactor

Last week we talked about fusion, where atoms come together to form heavier elements. This week, everything comes apart as we talk about nuclear fission. How it occurs naturally in the Universe, and how it has been harnessed by science to produce power, and devastating weapons.

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Fission – Show notes and transcript

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Astronomy Cast Ep. 205: Fusion

The interior of the Sun.

When the Universe formed after the Big Bang, all we had was hydrogen. But through the process of fusion, these hydrogen atoms were crushed into heavier and heavier elements. Fusion gives us warmth and light from the Sun, destruction with fusion bombs, and might be a source of inexpensive energy. We’ll also look into the controversy of cold fusion.

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Fusion – Show notes and transcript

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Podcast: More From Tony Colaprete on LCROSS

Artist concept of the Centaur and LCROSS heading towards the Moon. Credit: NASA

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I had the chance to interview LCROSS principal investigator Anthony Colaprete about the latest findings released from the lunar impact of the spacecraft a year ago, and in addition to the article we posted here on Universe Today, I also did a podcast for the NASA Lunar Science Institute. If you would like to actually “hear” from Colaprete, you can listen to the podcast on the NLSI website, or you can also find it on the 365 Days of Astronomy podcast.

365 Days of Astronomy Podcast to Continue in 2011

If you’ve been considering contributing a podcast to the 365 Days of Astronomy but just haven’t gotten around to it yet, there’s good news: the project will be continuing for another year — its third — in 2011. As far as we can tell, 365 Days of Astronomy is the most popular and successful user-generated podcast ever, as each podcast is listened to thousands of times. If you’re looking to share your experiences, thoughts, feelings, discoveries, or anything about space and astronomy, this is your big chance to find your voice and an audience to listen.

Since it is now the Year of the Solar System, it seemed like a good reason to keep this Energizer-Bunny project from the International Year of Astronomy going for another year. As the Project Manager, I hope you’ll join in, or at least check it out and start listening daily — if you aren’t already. Here’s the official press release:

The award-winning 365 Days of Astronomy Podcast is proud to announce the project will continue for yet another year – its third year — and is now accepting sign-ups for participants for another 365 podcasts in 2011. 2011 encompasses the Year of the Solar System, which marks an unprecedented flurry of robotic exploration of space, and is the perfect opportunity for more of the public to become involved in creating podcasts to share astronomy with the world.

365 Days of Astronomy is a legacy project of the International Year of Astronomy (IYA), and in 2009 was a major project of the IYA. For two years now, the project has published one podcast for every day of the year. The episodes are written, recorded and produced by people all around the world. “This podcast gives a voice to everyone in astronomy – professionals, amateurs, and those who just enjoy the amazing discoveries and images of our Universe,” said Dr. Pamela Gay, chair for the IYA’s New Media Group.

The 365 Days of Astronomy podcast is now looking for individuals, schools, companies and clubs to submit 5 – 10 minutes of audio for our daily podcast.

The 365 Days of Astronomy has gained a wide audience, and each podcast is heard by 5,000 – 10,000 listeners. The project was awarded a Parsec Award in 2009 for “The Best Info-tainment” podcast in 2009, and was nominated for the “Best Fact Behind the Fiction” award in 2010.

Participants can sign up to do just 1 episode or up to 12 episodes (one per month, subject to editorial discretion). People from every continent except Antarctica have submitted podcasts the past two years, and the 365 Days of Astronomy team encourages a more diverse population from even more countries to sign up for a particular day (or days) of 2011. A calendar of astronomical events is available on the project’s website to provide ideas but the podcasts can be about virtually any astronomical topic. “We are seeking a wide range of contributions, from simple concepts or how-tos to more in-depth discussions of complex concepts,” said Dr. Gay. “Over the past two years, we received a wide range of contributions, from simple at-home first-time podcasts to highly polished and professional recordings. We expect the same for 2011 and are looking to sign up a variety of participants, from amateur astronomers, classroom teachers and students to scientists, science bloggers and big media companies.”

The project is also asking individuals and organizations for financial support.

The podcast team also invites people and organizations to sponsor the podcast by donating $30 to support 1 day of the podcast, with your dedication appearing at the start of the show. For just $360, it is possible to sponsor 1 episode per month. Alternatively, you can also have a dedication message at the end of the show for a week, for a donation at the $100 level. These donations will help pay for editing, and posting of the podcasts.

For more information visit:

365 Days of Astronomy: http://365DaysOfAstronomy.org.

Astrosphere New Media: http://www.astrosphere.org/

Year of the Solar System: http://solarsystem.nasa.gov/yss/index.cfm

Astronomy Cast Ep. 202: The Planets at Gliese 581

Artist's impression of Gliese 581 g

With the discovery of a planet in the habitability zone of Gliese 581, the chances of finding life on other worlds is just getting better and better. Let’s take a look at the discoveries made at Gliese 581, provide some perspective on the real chances of life, and talk about what might come next.

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The Planets at Gliese 581 – Show notes and transcript

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