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The John Batchelor Show

DREAMING OF 2040: #Bestof2022: 1/2: #Uranus: Voyage to the unknowns of the gas giant. Ken Croswell, PNAS.

The John Batchelor Show

John Batchelor

Society & Culture, Arts, News, Books

4.52.8K Ratings

🗓️ 18 August 2023

⏱️ 16 minutes

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PHOTO: 945 GREEWICH ROYAL OBSERVATORY. 1NO KNOWN RESTRICTIONS ON PUBLICATION.
@BATCHELORSHOW

DREAMING OF 2040: #Bestof2022: 1/2: #Uranus: Voyage to the unknowns of the gas giant. Ken Croswell, PNAS.
https://www.pnas.org/doi/10.1073/pnas.2216692119
The recent decadal survey from the National Academies of Sciences, Engineering, and Medicine recommends that NASA’s next new large planetary mission take aim at Uranus (1). Unlike Voyager 2, which flew past the planet in 1986 (2), this new spacecraft would settle into orbit around Uranus and observe it for many years. At least one such orbiter has studied the five planets closest to Earth, from Mercury to Saturn. Uranus is twice as far as Saturn, yet a billion miles closer than Neptune, making Uranus the easier target. If NASA launches the mission in the early 2030s, it can reach the planet in the mid-2040s1

Transcript

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0:00.0

This is CBS Eye on the World.

0:08.0

Here's John Bachelor.

0:11.0

In and around the constellation Sagittarius, a discovery thanks to the Gaia spacecraft,

0:18.0

a discovery that takes us to the very beginning of our very lucky and very beautiful Milky Way.

0:25.0

Welcome, Dr. Ken Coswell, the author of The Alchemy of the Heavens,

0:29.0

another distinguished astronomy books, but right now reporting in science news,

0:34.0

new information of this discovery in and around the constellation Sagittarius.

0:39.0

Can a very good evening to you?

0:41.0

What has the Max Planck Institute found?

0:44.0

And what does it mean? Good evening to you.

0:47.0

Good evening, John. Well, this is a very exciting work that I report about at Science News.

0:52.0

And it really focuses on one of the themes of my book, The Alchemy of the Heavens.

0:57.0

How did this great galaxy that we now inhabit and that gave rise to the sun and the earthen to wonderful beings like you and me?

1:06.0

How did it all start?

1:08.0

And what these scientists have found with the help of data from the Gaia spacecraft

1:13.0

is the proto-galaxy that made the Milky Way.

1:17.0

It's the original nucleus of the Milky Way.

1:20.0

It's the kernel around which our great galaxy later grew.

1:25.0

And so now that we've identified these stars and there's 18,000 of them that have been studied that have been identified in this new study,

1:34.0

we can observe them further for additional details about the Milky Way's birth and its earliest evolution.

1:41.0

So it's an exciting piece of work and I think we're going to be seeing a lot more observations of these stars in the future.

1:49.0

The age is so called if time can be used here.

...

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