Author Topic: Scientists Discover Earthlike Planet (Read 932 times)

Vulcan · « **Reply #15 on:** April 25, 2007, 11:10:53 PM »

I'd be like being stuck in a 60's porno with bad red lighting 24x7.

Slash27 · « **Reply #16 on:** April 25, 2007, 11:14:13 PM »

Quote

Originally posted by Shifty
This looks like a good spot for a Kiligons in orbit around Uranus joke.

Well, no need for me to post now.

bozon · « **Reply #17 on:** April 26, 2007, 01:32:11 AM »

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Originally posted by lasersailor184
It takes 13 days to orbit it's sun. Why the hell is ours so slow?

I say we ignite rockets to speed it up. A 365 day year is so slow and boring.

Imagine having a birthday party every 13 days.

Actually, in order to increase the orbit speed (reduce orbit time) you need to loose energy, not gain more... This is one of the amusing aspects of gravitational potential wells. Loose energy, get hotter...

I never understood birthdays. What is so special in completing a revolution around the sun? Did we had to push earth around it? If I fly in a spaceship and catch the earth again after a year without circling the sun, did I get older? Is circling the sun by sitting on a rock is an achievement?

I propose measuring our achievement of circling the sun in radians, the total phase of rotation we have completed. It is not your age, but a prestigious rank indicating your contribution to the common effort of circling the sun. I have currently completed 64.3*pi radians.

Nilsen · « **Reply #18 on:** April 26, 2007, 02:15:07 AM »

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Originally posted by Meatwad
Red Dwarf?

Best "Sci-fi" series EVER.

Angus · « **Reply #19 on:** April 26, 2007, 05:41:40 AM »

Quote

Originally posted by bozon
Actually, in order to increase the orbit speed (reduce orbit time) you need to loose energy, not gain more... This is one of the amusing aspects of gravitational potential wells. Loose energy, get hotter...

I never understood birthdays. What is so special in completing a revolution around the sun? Did we had to push earth around it? If I fly in a spaceship and catch the earth again after a year without circling the sun, did I get older? Is circling the sun by sitting on a rock is an achievement?

I propose measuring our achievement of circling the sun in radians, the total phase of rotation we have completed. It is not your age, but a prestigious rank indicating your contribution to the common effort of circling the sun. I have currently completed 64.3*pi radians.

Would you care to explain a tad better?
AFAIK orbit speeds are, if anything, slowing down. So are rotation speeds. Our earth has a considerably longer day now than a billion years ago.
(oh, I only refer to your first lines)
As for the rest, you're having fun

Odee · « **Reply #20 on:** April 26, 2007, 06:09:48 AM »

Somebody said that Wal-Mart already has locked down franchise rights on the planet.

Might be a good place to send all the Liberals too. that way they'd have a fresh new world to screw up, without Conservatives butting in to annoy them.

Oh, and this Birthday gig? Seasons man, seasons. If the planet is anything like ours, weather wise, and you have an eliptical orbit as do we, and life evolved their sort of like Earth's... Well, Cold, you hibernate... Warm, you breed.

Would make interesting study in accelerated life cycles, yes?

MrRiplEy[H] · « **Reply #21 on:** April 26, 2007, 06:29:11 AM »

The coca-cola company recently notified the authorities that the so called red dwarf star was just a large coke ad on the sky and the gravity shifts around it were caused by Roseanne Bar hovering about looking for McDonalds.

bozon · « **Reply #22 on:** April 26, 2007, 07:33:41 AM »

Quote

Originally posted by Angus
Would you care to explain a tad better?
AFAIK orbit speeds are, if anything, slowing down. So are rotation speeds. Our earth has a considerably longer day now than a billion years ago.

I was refering to the attempt to make the year shorter. For that purpose you need a closer orbit since according to Keppler's law, for all planets:
R^3 / P^2 = constant
Where R is the orbital radius and P is the period.

Even though that the velocity in a shorter radius is greater (more kinetic energy) the total energy is lower since you are "deeper" in the potential well.
potential energy: -T (always negative and get more negative as radius decrease)
kinetic energy: K (always positive)
Virial theorem for a "relaxed" system: 2K=T
total energy: E=K-T=-1/2T
In other words, you have to loose energy in order to get (and stay) closer.

The earth rotation (around itself) slowly gets syncronized with the orbit around the sun due to tidal effects. This is what happened to the moon by the earth's tide force and its spin is now syncronized with its orbit around the earth.

btw, the ESO release (there's a link to the letter submited to A&A):
http://eso.org/outreach/press-rel/pr-2007/pr-22-07.html

Odee · « **Reply #23 on:** April 26, 2007, 09:36:04 AM »

Quote

Originally posted by bozon
...The earth rotation (around itself) slowly gets syncronized with the orbit around the sun due to tidal effects. This is what happened to the moon by the earth's tide force and its spin is now syncronized with its orbit around the earth.

btw, the ESO release (there's a link to the letter submited to A&A):
http://eso.org/outreach/press-rel/pr-2007/pr-22-07.html

What the majority of the world just read: "Earth rotaing around itself" and the sun being affected by our tides Imagine that, eh?

Yes I know most about solar tides, Earth/Lunar Tides, and so on and so forth... But the odd side of my brain just grinned when I saw how you put it. Did you know the Moon is getting further away from Earth each year? Why, what will aLGore blame that one on?

Now I am no astrophysics prof., or rocket scientist, but even a layman can figure that Keppler has it all wrong if he thinks an object, (in this case a planet) has to be closer to a sun to travel faster. All that proves is a perception of velocity due to proximity.

If you want a real good aneurism, try figuring out the velocity of the both planets:

Planet A rotates at 28,000 mph, while orbiting its Sun every 13.5 days at a distance of 7 million miles in a circular orbit. (I know circular orbits are an impossibility, but humor me)

Planet B rotates at the same speed, but from a further 90 million miles out, and matches Planet A's solar orbit of 13.5 days.

How fast is each planet travelling around the sun?

lazs2 · « **Reply #24 on:** April 26, 2007, 09:55:06 AM »

If it is a very cool planet then we could move there and heat it up!

neat how it all works out huh?

lazs

Catalyst · « **Reply #25 on:** April 26, 2007, 10:06:46 AM »

whats cool about this discovery is that it rotates in the planetary "COMFORT ZONE" tempetures from 0 to 40 degrees...means Liquid WATER!!!

water in its liquid form means a big BIG chance of 'LIFE'...biological for sure, maybe even animals, who knows...

once we get better instruments and more Data, maybe we'll actually be able to determine life forms...

and imagine, we are just starting to look out there for planets, 3 to 4 new discoveries every month...

bozon · « **Reply #26 on:** April 26, 2007, 11:05:00 AM »

Quote

Originally posted by Odee
If you want a real good aneurism, try figuring out the velocity of the both planets:

Planet A rotates at 28,000 mph, while orbiting its Sun every 13.5 days at a distance of 7 million miles in a circular orbit. (I know circular orbits are an impossibility, but humor me)

Planet B rotates at the same speed, but from a further 90 million miles out, and matches Planet A's solar orbit of 13.5 days.

How fast is each planet travelling around the sun?

The numbers for planet A do not match. With the given velocity and period, assuming circular orbit and negligible mass of the planet relative to the star, the distance is more like 1.5 million miles (velocity*period = 2*pi*radius)

For planet B, at a distance of ~100 million miles, the escape velocity from that same star will be about 5,000 mph. Give it a velocity of 28,000 mph and you'll never see it again...

Laurie · « **Reply #27 on:** April 26, 2007, 11:24:09 AM »

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Originally posted by Ripsnort
Have they claimed that humans are responsible for global warming on that planet yet?

silly arent you, can't have a civil discussion without dragging your little piece into other threads.

Odee · « **Reply #28 on:** April 26, 2007, 11:45:14 AM »

Quote

Originally posted by bozon
The numbers for planet A do not match. With the given velocity and period, assuming circular orbit and negligible mass of the planet relative to the star, the distance is more like 1.5 million miles (velocity*period = 2*pi*radius)

For planet B, at a distance of ~100 million miles, the escape velocity from that same star will be about 5,000 mph. Give it a velocity of 28,000 mph and you'll never see it again...

Actually, if we're about 93 million miles out, and that new planet is 14 times closer, then it would be around 6 million miles from the sun, or more accurately 6,642,857.1428571.1428571... etc. yes?

Regardless, the real question should have been interpreted as:" how fast does a body have to be to maintain geosynchronus orbits around a sun?" All the other kahkah was BS fluff

VooWho · « **Reply #29 on:** April 26, 2007, 12:41:54 PM »

Do you think the Aztechs, Egyptians, and all the other pyrmid worlds of ancient time are on this planet doing the same thing again with the help of Aliens?

Whats the reason why we can't move to Mars? I know the atmosphere is not quite like ours, but I think its somewhat close.