Image of the day

From the
ATWB Customer Gallery

North America Nebula NGC 7000

My Account

New to Astromart?

Register an account...

Need Help?

Was Venus Once Habitable?

Posted by Guy Pirro 10/24/2019 08:23PM

Was Venus Once Habitable?

Venus may have had a stable climate for billions of years. Now, a new study is uncovering the possibility that a global resurfacing event, probably linked to volcanic activity, may have transformed the planet from an Earth-like climate to the 462 degree hot-house that we see today. Earth and Venus seem completely different. Earth is a lush, clement world teeming with life, while Venus is hellish, with its surface roasting at temperatures higher than those of a kitchen oven. But underneath it all the two planets share a number of striking similarities. They are nearly identical in size. The basic composition of Venus and Earth is very similar. One difference stands out, however -- Venus has very little water. Were the contents of Earth's oceans to be spread evenly across our world, they would create a layer 3 km deep. If you were to condense the water vapor in Venus' atmosphere onto its surface, it would create a global puddle just 3 cm deep. Something catastrophic happened on Venus and what caused this is still a mystery.


Comments:

  • str_mkr [Steve Heckenlively]
  • 11/06/2019 11:00PM
About 10 years ago I read a study focused on how Venus acquired it rotational characteristics.
The study's most likely scenario was not 1, but 2 massive early collisions, equal to or greater
than Earth's collision in which the Moon was formed.
The 2nd hit on Venus obliterated any chance the re-coalesced remains could ever resemble Earth.
And left it with the devastated rotational characteristics we see today.

  • TYSONM [Tyson McVicar]
  • 11/18/2019 01:59AM
Awesome article, great read!