StarDate

Moon and Venus


Listen Later

Venus is continuing its slow return to view as the “evening star.” It stands to the lower right of the Moon about 30 minutes after sunset. The planet is quite low in the sky, though, so any obstructions along the horizon will block it from view.

The surface of Venus is rugged. Almost all of it consists of volcanic rock. For a while, the leading idea said the entire surface was repaved by a massive outpouring of molten rock several hundred million years ago.

But studies in the last decade or so have presented a more nuanced view of the planet. Different rock formations appear to have been deposited at different times, with some formations lying atop others.

And there’s pretty good evidence that Venus is volcanically active even today. Blocks of rock that are miles wide appear to be shifting around. They look like blocks of ice moving atop an ocean or sea here on Earth. That suggests the blocks are floating atop molten rock not far below the surface.

Orbiting spacecraft have seen “hotspots” on the surface that could be active eruptions. They’ve also “sniffed” elements in the upper atmosphere that probably came from recent volcanic eruptions.

Together, these findings suggest that it took a long time to repave the surface of Venus — perhaps a billion years or longer — and that the process isn’t done yet.

Again, look for Venus close to the Moon shortly after sunset. The brilliant planet will inch its way higher into the evening sky over the coming weeks.


Script by Damond Benningfield

...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

1,345 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