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Hosts: Fraser Cain, Scott Lewis

Astronomers: Bill McLaughlin, David Dickinson, Tom Nathe, Mike Phillips

Viewing: M103, Cocoon Nebula, Comet Lovejoy, more to come!

Virgin Galactic CEO George Whitesides

Sometimes the Sun is quiet, and other times the Sun gets downright unruly. During the peak of its 11-year cycle, the surface of the Sun is littered with darker sunspots. And its from these sunspots that the Sun generates massive solar flares, which can spew radiation and material in our direction. What causes these flares, and how worried should we be about them in our modern age of fragile technology?

Visit the www.astronomycast.com to subscribe to the audio podcast!

We record Astronomy Cast as a live Google+ Hangout on Air every Monday at 12:00 pm Pacific / 3:00 pm Eastern. You can watch here on Universe Today or from the Astronomy Cast Google+ page

Welcome to the Universe Today YouTube channel.

Learn about space and astronomy from our various videos.

Guide to Space: Short explainer videos from Fraser Cain investigating various concepts in space and astronomy.

Astronomy Cast - A weekly fact-based journey through the cosmos with Universe Today publisher Fraser Cain and Dr. Pamela Gay, a professor at the University of Southern Illinois, Edwardsville.

Weekly Space Hangout - A weekly roundup of the big space and astronomy news stories of the week with a team of space and astronomy journalists. Hosted by Fraser Cain.

Virtual Star Party - Join Fraser Cain, Scott Lewis and a team of astronomers for a live view of the night sky. We'll broadcast whatever's up in the sky with whatever telescopes aren't rained out. See the Sun, Moon, planets and deep sky objects, live on your screen.

The number of protons defines an element, but the number of neutrons can vary. We call these different flavors of an element isotopes, and use these isotopes to solve some challenging mysteries in physics and astronomy. Some isotopes occur naturally, and others need to be made in nuclear reactors and particle accelerators.

Some astronomers are control freaks. It's not enough to buy a telescope, they want to craft every part of the experience with their own hands. If you're ready, and willing to get your hands dirty (and covered in glass dust), you can join thousands of amateur telescope makers and build your own telescope from scratch.

The Universe is filled with hot fusion, in the cores of stars. And scientists have even been able to replicate this stellar process in expensive experiments. But wouldn't it be amazing if you could produce energy from fusion without all that equipment, and high temperatures and pressures? Pons and Fleischmann announced exactly that back in 1989, but things didn't quite turn out as planned...