StarDate

Uranus at Opposition II


Listen Later

As befits a giant planet, Uranus has a giant entourage of moons — at least 27 of them. Yet the planet is so far away that its moons are tough to see. In fact, most of them weren’t discovered until the last few decades.

William Herschel discovered the first two in 1787 — not long after he discovered the planet itself. Herschel proposed naming them for characters from Shakespeare, and his colleagues agreed. So those first discoveries were named Titania and Oberon, for the queen of the fairies and her husband from “A Midsummer Night’s Dream.”

Not surprisingly, they’re the biggest of all the planet’s moons. Titania is a thousand miles in diameter, while Oberon is just a bit smaller.

William Lassell discovered the next two moons of Uranus — the third- and fourth-largest — in 1851. And Gerard Kuiper discovered the next one — the fifth-largest — at McDonald Observatory in 1948.

Since then, the moons have come in bunches. The Voyager 2 spacecraft revealed 10 new moons when it flew past the planet in 1986. The rest have been found since then, with Hubble Space Telescope, telescopes on the ground, and through more analysis of the Voyager observations — giving Uranus a mighty entourage.

Uranus itself is in view all night, in the constellation Aries. It’s brightest for the year, too. It’s so far away, though, that you really need binoculars to see the planet — and a telescope to see any of its moons.
 

Script by Damond Benningfield

Support McDonald Observatory

...more
View all episodesView all episodes
Download on the App Store

StarDateBy Billy Henry

  • 4.6
  • 4.6
  • 4.6
  • 4.6
  • 4.6

4.6

251 ratings


More shows like StarDate

View all
Science Friday by Science Friday and WNYC Studios

Science Friday

6,133 Listeners

BirdNote Daily by BirdNote

BirdNote Daily

1,190 Listeners

Planetary Radio: Space Exploration, Astronomy and Science by The Planetary Society

Planetary Radio: Space Exploration, Astronomy and Science

1,344 Listeners

Radiolab by WNYC Studios

Radiolab

43,967 Listeners

Astronomy Cast by Fraser Cain and Dr. Pamela Gay

Astronomy Cast

2,866 Listeners

The 365 Days of Astronomy by 365DaysOfAstronomy.org

The 365 Days of Astronomy

336 Listeners

Universe Today Podcast by Fraser Cain

Universe Today Podcast

544 Listeners

Ask a Spaceman! by Paul M. Sutter

Ask a Spaceman!

804 Listeners

Space Nuts: Astronomy Insights & Cosmic Discoveries by Professor Fred Watson and Andrew Dunkley

Space Nuts: Astronomy Insights & Cosmic Discoveries

221 Listeners

SpaceTime: Your Guide to Space & Astronomy by Stuart Gary

SpaceTime: Your Guide to Space & Astronomy

320 Listeners

Short Wave by NPR

Short Wave

6,259 Listeners

The Supermassive Podcast by The Royal Astronomical Society

The Supermassive Podcast

287 Listeners

NASA's Curious Universe by National Aeronautics and Space Administration (NASA)

NASA's Curious Universe

851 Listeners

Why This Universe? by Dan Hooper, Shalma Wegsman

Why This Universe?

363 Listeners

Crash Course Pods: The Universe by Crash Course Pods, Complexly

Crash Course Pods: The Universe

505 Listeners