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LightSail Then and Now

In 1976, Carl Sagan appeared on The Tonight Show to talk about a crazy new idea: solar sailing. Nearly 40 years later, The Planetary Society is realizing this dream with a new spacecraft called LightSail designed to propel through space on beams of sunlight.

 


 

If Mars Were the Size of a Gladius Sword...

How big is the Sun compared to Mars? Dr. Bruce Betts has this week's Random Space Fact!

 


 

Intro Astronomy 2015. Class 12: The Sun and Stars

Lecture 12 of Dr. Bruce Betts' 2015 online Introductory Planetary Science and Astronomy course covers the Sun (physical characteristics, zones, solar cycle, sunspots, flares, coronal mass ejections, fusion, etc.) and Stars and Stellar Evolution (star types and colors, evolution, HR Diagrams, birth and death phases, white dwarfs, neutron stars, black holes). Recorded at California State University Dominguez Hills.

 


 

What is Astrobiology?

OSIRIS-REx explores Astrobiology in this 321-Science video.

 


 

All those Asteroids with Amy Mainzer

How many asteroids has NEOWISE discovered? Dr. Bruce Betts has this week's Random Space Fact!

 


 

Intro Astronomy 2015. Class 11: Exoplanets and Solar System Origin and Formation

Lecture 11 of Dr. Bruce Betts' 2015 online Introductory Planetary Science and Astronomy course covers exoplanets (planets around other stars) including discovery techniques, current knowledge and characteristics, and multi-planet systems. Lecture 11 also covers the origin and formation of the Solar System. Recorded at California State University Dominguez Hills.

 


 

Bill Nye's Message to Planetary Defenders

On April 15th, Planetary Radio held a live event at the Italian Space Agency in the context of the 2015 Planetary Defense Conference. Asteroid defenders from around the world attended, but unfortunately our CEO Bill Nye was tied up at the Space Symposium. Here was his charming, long distance message to the audience in Frascati, Italy.

 


 

Age of the Universe

Cosmologists think the universe is HOW old? Dr. Bruce Betts has this week's Random Space Fact!

 


 

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