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The Venus Transit 2004
Walkiry writes "In just 47 days our friendly neighbour planet Venus will be passing right in between Earth and good ol' Sun, giving us the chance to see a small black spot going accross the disk (last one was in 1882). This is called the Venus Transit. The interesting thing is that there is a project asking for volunteers to perform their own measurements of the phenomena and submit their own results, in what will be the first accurate and public measurement of an extraterrestrial distance. Do you have a spare telescope and some free time on June 8th?"
Of course we do. What did you think we would be doing, going on dates with women?
Okay, everybody stare directly at the Sun.
Ahhh, My EYES! The goggles do nothing! (Damn you /.)!
...accurate and public measurement of an extraterrestrial distance.
Maybe it's just me, but somehow those two words don't seem to quite go together.
Nothing disturbs me more than blind loyalism towards some unrealistic and over-idealistic notion of one's nationality.
Apaprently, the next Venus transit after this one will be in 2012, but the next two after that won't be until 2117 and 2125. Looks like a once in a lifetime deal. (source: http://sunearth.gsfc.nasa.gov/eclipse/transit/venu s0412.html)
Homer: It's like you're from Venus... ...and you're from Mars.
Marge:
Homer: Oh, sure, give me the one with all the monsters.
Nyo nyo, the Neko Boy has spoken.
It was in a situation like that that Venus athmosphere (its clounds) was discovered, when Venus was against the sun an astromer saw a fog over the planet. A lot of light passed trough where previously was thoug to be solid.
This is what i found in Wikipedia on Venus Transits:
"Transits of Venus, when the planet crosses directly between the Earth and the Sun' visible disc, are important astronomical events. The first such transit was observed on December 4, 1639 by Jeremiah Horrocks and William Crabtree. A transit in 1761 observed by Mikhail Lomonosov provided the first evidence that Venus had an atmosphere, and the 19th century observations of parallax during its transits allowed the distance between the Earth and Sun to be accurately calculated for the first time. The previous set of transits of Venus occurred within the interval of 1874 - 1882, and the next set of transits will occur in the period of 2004 - 2012."
"Anyone who quotes me in their
What's proabaly better is a projection scope. A prpoer one is very expensive, but you can just hold any convex lense or piece of shirt cardboard with a really tiny hole in it above a piece of white paper. You'll need very good resolution to see this though, so you should probably calculate that ahead of time.
Sig:Why copyright isn't a fundamental human right
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Create a WAP server
you should go here
I have no developed opinion on the bararity of foo. -homeobocks, Gentoo Forums
Blame your current administration, everyone else seems to.
:-)
(tinfoil-hat on)
A bit of a coinicidence that these events are not visible or clouded out, isn't it?
Those "Clouds" are carefully engineered using stratotankers dumping chemtrails to keep you passive and unresisting, and also to obscure your view of anything that might possibly cause you to question your leaders.
Ah, crap, I can't keep up this tinfoil hat charade... but surely someone can extrapolate further from what I've posted. Carry on
You are in a twisty maze of processor lines, all alike.
There is a lot of hype here.
Despite warnings every year people get blinded because they wanted to see a partial eclipse or some other solar event directly.
Use a telescope or binoculars and project the image onto a piece of white cardboard or paper.
Even just a few seconds can ruin your eyesight so be careful. It's no joke.
The other kind of sun filter fits over your eyepiece or inside your eyepiece. I once had a 2.4 inch refracting telescope that came with this piece of welder's glass that fit over the eyepiece. I never used it because I was warned not to.
The advantage of the objective sun filter (the ones I have seen advertised are aluminized mylar) is that 1) it blocks out intense sunlight before it even gets to your telescope, and 2) it is exposed to no more than normal sun intensity because it hasn't been concentrated by the telescope.
The wee bit of welder's glass at the telescope eyepiece is unsafe because it is getting the full focus of sunlight from the telescope and the thing and crack from the heat and then your eyeball is in peril.
The other safe method is projection through the telescope on to a piece of paper. Safe for one's eyes -- I ruined my beginner's refractor doing that because the heat cooked a cheap plastic element in the one eyepiece it came with.
Find the biggest paper cup or popcorn bucket possible, tape thin paper over the top and poke a hole in the base. Point at sun, view image on paper. It's easy enough to teach the kids in the neighborhood when the parents wonder what the strange guy with the paper cup is doing.
If the image isn't large enough, simply pull the paper off and project in the usual way. The paper cup is easy enough for kids to hold. For some reason, flat sheets turn into crumpled useless things when exposed to kids.
One line blog. I hear that they're called Twitters now.
I made a quick video using Celestia of the Venus transit. It requires Divx and it's about 330KB in size and runs for 18 seconds.
:)
Here is the link. Ugh, be gentle.
This also just gave me an idea. Being in North America, I might use Celestia to watch this happen in real time on June 8!