Venus Definition and 115 Threads

Lets say you have a 20 km wide stony/iron asteroid hurtling towards Venus at 18 km per second at a 45 degree angle. Would an asteroid of this size hit the surface of Venus or just blow up in the atmosphere? I know that an asteroid of this size would hit the surface of Earth but I am...

Hi! I was wondering if anyone of you know how to calculate the astronomical unit 1 AU, using data from a Venus transit and not using the parallax method. I already have all the data from the 2012 transit; the time it was in phase 1 when it contacts the Sun's disk and when it leaves the disk...

I just need someone to double check my answer and confirm they get the same answer as I do. Thanks. Question: Find the attractive force between Vneus and the sun. The distance between their centers is 1.08x10^11. Equation: F = Gm1m2/d^2 G= 6.67x10^-11 N.m^2/kg^2 m1 (mass of sun)=...

Apparantly this one was missed, at least nothing turned up on a search. Obviously you can speculate all you want about atmosphere and winds but you can't explain away the loss of angular momentum. But then again, a long time ago, when thinking out the box was still allowed, there was a...

Hi! Newly registered here, with an optics question. I was going through some photos I took of the transit of Venus this year, where I'd used a reflecting telescope to project the image of the sun and the passing planet onto a piece of white paper. Image: http://imgur.com/3mdUN I showed it...

At Earth orbit, above the atmosphere, the solar power flux is roughly 1400 watts per square metre. This corresponds to a a pressure of 4.7 \muN per square metre, or roughly one two thousandth of the weight of a paper clip at the Earth's surface. A perfectly reflecting material would feel double...

Peaks of mountains in Venus are more than that on the Earth Is there any active volcano? Plz tell me about any active volcano in space

As you may know there was a transit of Venus on the 5/6th of June. The Sun rose here at ~04:40 BST with the transit in progress, however at that time there was cloud on the Eastern horizon to an elevation of 10-20 degrees, so no chance of seeing the transit. Just before leaving for work at about...

photos here: next time, 2117...YOU won't be here to see it then! http://www.dailymail.co.uk/sciencetech/article-2155140/Transit-Venus-2012-Spectacular-seen-time-2117.html

You can see the Transit of Venus live here: http://events.slooh.com/ Starts in 5 minutes.

Knowing the temperature at the surface of the Earth to be 72 F, find the tem- perature at the surface of Venus. ( show your work step by step.)

Can the Venus transit be viewed with the naked eye? I do have a solar filter (from the anstronomy department of a university), so this isn't about safety issues. The question is would I need a telescope to oberve the dot or can I just look at it?

Venus will cross the Sun on June 5-6 of this year. Historically, the transit of Venus holds a significant place in the history of astronomy. As most know, Kepler's third law stated the square of the period of a planet is proportional to the cube of it's mean distance. Newton's Laws of...

Hello! I'd like to know when the high density of the atmosphere of Venus was first determined or suspected. Was it with the Russian probes that the first evidence came that the atmosphere was much more dense than the Earth's? Or had there been other indications earlier in time that such was...

questions about the Soviet's Venus missions I was reading about the Soviet Union's Venus missions and they equipped Venera 9 orbiter with cherenkov detector. So it detects particles traveling faster than the speed of light in a given medium What was this Cherenkov detector used for? It...

So this weekend I read a little about the Dresden Codex of the Maya (their astronomical log) and played a little bit with Stellarium trying to imagine the sky they saw. I noticed something that I think is interesting, Venus wasn't very visible during the equinox every four years because the...

I was looking at the sky last night, and I saw Venus to the west, really high in the sky. It was brighter than any star that night. Why am I able to see it? It seems like, since we are on the side of the Earth facing opposite the sun at night, I should be able to only see the planets that are...

What is the minimum angular distance from the Sun for Venus to be visible TO THE NAKED EYE?

Hi - just a question about the Jupiter - Venus conjunction that's happening at the moment. How often does it happen that the two planets appear this close in the sky? Or, better, how could I calculate this?

http://www.esa.int/esaCP/SEM0TLSXXXG_index_0.html Measurements by Venera, Magellan and Venus Express over a period of years indicate that Venus is slowing its already leisurely rate of rotation. Venus has unusual retrograde spin, and one day on Venus is equivalent to about 224.7 Earth...

Venus' synodic period is 583.92 days. Does that mean that Venus is 583.92/2 days the evening star and 583.92/2 days the morning star (with some period in between when it's probably to close to the sun to be visible)? What I want to know is some kind of formula so that I know where and when to...

I choose this site because it displays the pictures, but the article is hitting all the news sites: http://yourtubenews.ning.com/forum/topics/life-spotted-on-venus-russian-scientist Considering extreme life does exist on Earth is it possible that it does exist on Venus. After all the thick...

I understand that, given Earth's distance from the Sun and it's atmospheric pressure, it is possible for liquid water to flow and to rain down on Earth's surface. I also understand that, given Titan's distance from the Sun and it's atmospheric pressure, it is possible for liquid methane to flow...

Neither Mercury, Venus or Mars have a planet generated magnetic field and the lack of this is given as the reason why Mercury and Mars have lost their atmosphere to the solar wind. But Venus quite clearly still has it's atmosphere - why has it not lost it too? Internet investigations describe...

Hi, I was just wondering if some astronomers here could help me indentify 2 bright things in the sky. I'm not an astronomer, but I'm quite interested in the subject. One of these things can be seen at about 6.00 P.M. to about 10.30 P.M. where I'm from (Southern Europe). It shows up in the...

Ok, just trying to figure out the angular size of venus. I have charted and figured out the distance between Earth and Venus at this certain time is: 149,600,000.00km Now the diameter of Venus is 12104km. venus angular diameter is: 9.565 so is it 9.565 x 12104/149,600,000 Is that...

Given the following: Its a polar graph. I am trying to figure out when is VENUS visable in the sky during this period (dawn, dusk, noon, midnight) ? How do you figure that out? Also, Venus is red, Earth is green on the chart. Thanks!

Right now Tim Reid (Venus Flytrap) is visiting next door to me. My neighbor is the brother of Tim's wife, Daphne Reid (Fresh Prince, etc). I'll be going over tonight for the birthday party of their common niece. So, what do I say? (Anyone under 40, google "WKRP in Cincinatti")

Venus and Mercury arguably are the most valuable real estate in the Solar system. I propose a reason why we will never exploit them, and why it is a pity. See next message.

I came out of a store, yesterday, and noticed a small shiny object in the sky, looking what you'd expect a star to look like. At first, I thought it was a high flying jet with the sun gleeming off it, but as I continued to watch it, it was obviously stationary. I watched it for several minutes...

Edit: perhaps this might belong in one of the Physics help forums? Oops. Mods, please move if so! Homework Statement Show that a transit of Venus across the Sun’s disk lasts at most about 8 hours. The synodic period of Venus is 584 days and its orbital radius is 0.723 A.U. The Sun’s angular...

Did Venus have liquid water in it's early history?

Venus currently does not have a magnetic field. I have come across one source that says the rotation plays a part in this, and another source that says that is a misconception. http://hyperphysics.phy-astr.gsu.edu/HBASE/magnetic/magearth.html" and then...

Hi all, my homework question is this: 1. What is the angular speed in rad/s of a point on the equator of venus? (Rotation period: 243 days) 2. What is the angular speed in rad/s of a point on the surface of venus at latitude 11 degress south? I know this isn't that difficult but I can't...

This is a purely hypothetical question, of course -- but what if our solar system had evolved with Mars and Venus switched, with each occupying the other's orbit? Would each have ended up more Earth-like today as a result?

The dense atmosphere on the planet Venus makes Venus the hottest planet in the solar system, even hotter than Mercury the closest planet to the Sun. suggest an explanation for this anomaly that involves the electromagnetic spectrum. - Electromagnetic waves travel slower in denser mediums, and...

I am not a student of astronomy or physics, or any sciences for that matter. But I do have some things I wish to ask the scientific community here in the hopes of better understanding all of your viewpoints as to the title of this topic. First question: a. Assume that Earth is about to face a...

I got in an argument and I was defending one of the theories about Venus' slow prograde rotation. I'm defending the theory which states that atmospheric friction, over a period of billions of years slowed initially fast rotation of Venus and made it go prograde. My opponent says that it...

planet venus? i read sometime ago that the venus revolves in opposite direction around the sun as compared to other planets.please tell me is it true? if yes then WHY?

The passage below is quotted from wikipedia: "The cycle between one maximum elongation and the next lasts 584 days. After these 584 days Venus is visible in a position 72 degrees away from the previous one. Since 5 * 584 = 2920, which is equivalent to 8 * 365 Venus returns to the same point...

Back in the old celestial mechanics forum, I wrote about a simulation in GravitySimulator where I created a moon with twice the mass of Mercury, and set it in orbit around Venus, right at Venus's L1 distance. The moon orbits a few times and then gets left behind. I thought at first that Mercury...

Venus has a rotational period of 243 days. What would be the altitude of a syncom satellite for this planet? I am pretty sure a syncom satellite is a satellite that orbits synchronously to the rotation of the planet. I don't know how to solve this problem... help

Hello what if a big comet(let's say, as big as our moon), made mainly of ice(95%), hit venus, 1) Would this change the orbit of venus, and if it did, would there be any effects on Earth and any other planets. 2) Would the atmosphere of venus changed, if yes, what would be the...

Consider this scenario: a Mars-size object strikes a glancing blow at Venus's backside that's facing toward the Sun. The resultant debris cloud would then coalesce into a large moon having a retrograde orbit. Tidal friction would then slow down Venus' rotation until it was tidally locked to its...

At the moment you can easily see Venus at any time during the day with a small set of binoculars, or even with the naked eye if you look closely enough and know where to look-around about 31 degrees away from the sun. I was thinking about the experiment to test relativity, where starlight was...

i am sooooo lost in what edmund halley did. so far i understand that he used parallax and the venus transit to solve for the distance between Earth and sun but how did he exactly do it? http://www.exploratorium.edu/venus/P_question4.html the link above explains a lot but it doesn't...

We have lift off. http://news.google.com/news?q=venus+express+launched&hl=en&lr=&ie=UTF-8&sa=N&tab=nn&oi=newsr So, are we on the brink of solving many issues of Venus or are we going to find more mysteries?

I think I might have a possible explanation for the peculiar, west-to-east rotation of Venus, where a day is longer than a year. :rolleyes: Venus "wants" to have one side always facing the sun, so that one rotation would equal one revolution (like the Moon). However, once Venus achieved this...

My Venus- thread that leads a disgraceful existence in crackpots corner may be known here. It argues, supported by lots of evidence that Venus'spin has come to a standstill due to a "design flaw", generating an enormous heat in the process. This would have evaporated the oceans and dissocated...

1. The mass of Venus is 81.5% that of the earth, and its radius is 94.9% that of the earth. Compute the acceleration due to gravity on the surface of Venus from these data. What is the weight of a 5.00-kg rock on the surface of Venus? 2. Venus orbits the sun in a nearly circular orbit...