A very special planet

 

A very special planet

In the Solar System there is a very special planet, where the day lasts more than a whole year! In fact, Venus completes a revolution around the Sun in 225 terrestrial days, while its rotation period is 243 terrestrial days!

Why Venus takes so long to complete a rotation is still being studied: so far several theories have been formulated, but none of these have been universally accepted.According to one theory, the rotation was slowed down by the tidal forces that the Sun exerted on the Venusian atmosphere. This is in fact much denser and heavier than the Earth's atmosphere and could have influenced the evolutionary history of the planet.

However, this theory does not take into account that the axis of rotation of Venus is inclined by more than 177° respect to the perpendicular to the plane of the ecliptic. It has therefore been hypothesized that during its formation Venus was hit by another protoplanet, which slowed its rotation and destabilized its axis. Collisions between large bodies were not rare events in the early life stages of the Solar System: let us remember that the Moon was also formed after the forming Earth was hit by a protoplanet.


CAM

Comments

Post a Comment

Popular posts from this blog

That Uplifting Tweet You Just Shared? A Russian Troll Sent It

Image
Here’s what Russia’s 2020 disinformation operations look like, according to two experts on social media and propaganda. By   DARREN LINVILL   &   PATRICK WARREN Internet trolls don’t troll. Not the professionals at least. Professional trolls don’t go on social media to antagonize liberals or belittle conservatives. They are not narrow minded, drunk or angry. They don’t lack basic English language skills. They certainly aren’t  “somebody sitting on their bed that weighs 400 pounds,”  as the president once put it. Your stereotypical trolls do exist on social media, but the amateurs aren’t a threat to Western democracy. Professional trolls, on the other hand, are the tip of the spear in the new digital, ideological battleground. To combat the threat they pose, we must first understand them — and take them seriously. MORE: https://www.rollingstone.com/politics/politics-features/russia-troll-2020-election-interference-twitter-916482/ P...
Read more

The Nightmare Scenario That Keeps Election Lawyers Up At Night -- And Could Hand Trump A Second Term

Image
The Nightmare Scenario That Keeps Election Lawyers Up At Night -- And Could Hand Trump A Second Term   (Photo: Photos: Getty Images) Americans will almost certainly go to bed on Nov. 3 without knowing who won the presidential election. Since millions of people will vote by mail, constraints on time and resources will slow ballot counting into potentially a weeks-long process. Voting patterns suggest it’s likely that President  Donald Trump  could end Election Day in the lead in certain key states, only to be overtaken by Democratic opponent  Joe Biden  when more votes are tallied.  This could create a nightmare scenario during the three months stretching from Election Day to the Jan. 20 inauguration: a battle on the state and congressional level over who is the legitimate winner. This could include Congress reconvening on Jan. 6, presided over by Vice President  Mike Pence , with no consensus over its potential role in choosing the next president. This...
Read more

When Life Hands You Lemons

Image
 It's like this folks: sometimes your mind goes blank. Happens more than usual with me of course. Take this forum for instance. I wanted to post something today and couldn't think of a topic. At least not a non-sexual one and we know sexual ones lately have been frowned upon.  Then along comes one of our regulars and complains about something. Well, they might not say it was a complaint, just an observation, but it was a complaint. A minor one. It has something to do about being able to make something out of nothing. Sort of like me this morning, how to make a thread out of an empty head? But they (notice I am using the correct pronoun, not saying he or she), by what they said got me thinking. What I thought was: Not sure if that is the actual saying, if I remember correctly, I remember the saying going something like this: Umm, no, I don't think the saying I am thinking of goes that way either, maybe ONE of you good folks can remind me how the saying goes. Either way, when...
Read more