SPACE EXPLORATION, APOLLO 11 MISSION, FIRST  MAN TO LAND ON MOON, WALK ON MOON, AMERICAN ASTRONAUT WITH U.S. FLAG, SPACE SUIT, LUNAR SURFACE, FOOTPRINTS, CENTURY SHOWCASE

Relive Those Thrilling Days of Yesteryear

Relive Those Thrilling Days of Yesteryear

Skytalk is hosted by WHYY's Dave Heller. Each week he discusses the latest news in astronomy with Dr. Derrick H. Pitts of the Franklin Institute.

All Episodes

Orbit position of the asteroid 162173 Ryugu on June 30, 2018 (NASA)

Reaching Ryugu

Japan’s Hayabusa 2 spacecraft arrives at asteroid Ryugu on Wednesday, beginning a string of encounters including fly-bys, ...

Air Date: July 10, 2018

Listen 07:23
Atacama cosmology telescope

Signs of Inflation

Dave Heller and Derrick Pitts, chief astronomer at the Franklin Institute, discuss efforts to peer all the way back in time and space wit ...

Air Date: June 25, 2018

Listen 13:05

Only the Shadow Knows

As we approach Summer Solstice, vertical shadows come to their shortest length. Stepping out for lunch with your work colleagues tomorrow ...

Air Date: June 11, 2018

Insatiable

An especially carnivorous supermassive black hole sitting at the center of a galaxy is gobbling galactic gases at an astonishing rate ...

Air Date: May 21, 2018

Listen 06:00

The Color Purple

Newly discovered? A purple planet! Actually, the color suggestion is just speculation based on the planet’s expected chemical compo ...

Air Date: April 30, 2018

Listen 06:11

Phillyhenge

Move over Stonehenge – Philadelphia will feature its own version on Friday, April 6 at 7:30 p.m., when the sunset will align with M ...

Air Date: April 2, 2018

Listen 05:39

How Big is Big?

An acceptable range for the estimated number of galaxies in the universe is between 100 and 200 billion, according to astronomer Mario Li ...

Air Date: March 26, 2018

Listen 07:19
More from Skytalk