Orbital Path

43 EpisodesProduced by PRX

space, stars, the universe and us

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Black Holes from the Dawn of Light

October 26th, 2018

22:33

To make a black hole, you need to think big. Really big.

Start with a star much bigger than the sun — the bigger the better. Then settle in, and …

Space Lasers for the Home Planet

September 28th, 2018

23:57

On September 15, 2018, the last Delta II rocket lifted off from Vandenberg Air Force base, in California. It carried into orbit IceSat-2 — a satellite equipped with perhaps the most sophisticated space laser ever built.

Brian Greene goes to 11 — again

August 31st, 2018

30:55

We live our lives in three dimensions. But we also walk those three dimensions along a fourth dimension: time.



Our world makes sense thanks to mathematics. Math lets us count our livestock, it lets us navigate our …

The Universe of Leonard Susskind

July 27th, 2018

27:10

To hear Leonard Susskind tell it, we are living in a golden age of
quantum physics.

And he should know.

Susskind is a grandee of theoretical …

Mars Goes Organic

June 29th, 2018

28:11

For a long time, probably as long as we have been gazing up at the night sky, people have been asking ourselves: Are we alone? Is there life out there, anywhere else in the universe?

For modern Earthlings, our …

Earth, Desert Planet?

March 23rd, 2018

6:59

Zoe is in 8th grade. She’s a student in Mr. Andersen’s Earth science class at a public school in Brooklyn.

Lately, she’s been concerned about the …

Our Darkening Universe

March 9th, 2018

21:29

Secrets of the universe? A glimpse of the whiteboard in the office of Nobel Prize-winning astrophysicist Adam Riess.

Adam Riess was only 41 when he was named a Nobel Prize winner. The Johns Hopkins distinguished …

Introducing…Telescope!

February 23rd, 2018

8:20

Instead of grappling with the big, cosmic questions that preoccupy adults, this week on Orbital Path we’re doing something different.

We’re grappling …

Star Death Tango

February 9th, 2018

24:10

On August 17, 2017, an alert went out.

Gravitational wave detectors in Louisiana and Washington state had detected a disturbance from deep space.

The effect was subtle — these detectors and a sister site in Italy …

Ozone Disaster Redux

January 26th, 2018

20:01

Scientists in 1985 discovered something that threatened the world we live in:

The ozone layer had a hole in it.

A big one. And this hole was …

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