Join Donate

Planetary TVRandom Space Fact

How Big Telescopes Work

Bruce is at Mt. Wilson to explain how big telescopes, like the 100-inch, can look deep into space.

Starring Dr. Bruce Betts • Music by Jim McKeever

You are here:
Comments & Sharing
astronaut on Phobos
Let's Change the World

Become a member of The Planetary Society and together we will create the future of space exploration.

Join Today

Europa
The Planetary Fund

Help advance robotic and human space exploration, defend our planet, and search for life.

Donate